When I select "Create New World", the Game crashes. Here's the Crashreport:

---- Minecraft Crash Report ----
// You're mean.

Time: 29.12.13 14:38
Description: Updating screen events

java.lang.NullPointerException
at invtweaks.forge.InvTweaksMod.setTextboxModeStatic(InvTweaksMod.java:74)
at net.minecraft.client.gui.GuiTextField.func_73796_b(SourceFile:437)
at net.minecraft.client.gui.GuiCreateWorld.func_73866_w_(GuiCreateWorld.java:123)
at net.minecraft.client.gui.GuiScreen.func_73872_a(SourceFile:94)
at net.minecraft.client.Minecraft.func_71373_a(Minecraft.java:730)
at net.minecraft.client.gui.GuiSelectWorld.func_73875_a(SourceFile:124)
at net.minecraft.client.gui.GuiScreen.func_73864_a(SourceFile:69)
at net.minecraft.client.gui.GuiScreen.func_73867_d(SourceFile:128)
at net.minecraft.client.gui.GuiScreen.func_73862_m(SourceFile:107)
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1564)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:908)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:836)
at net.minecraft.client.main.Main.main(SourceFile:101)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:57)
at net.minecraft.launchwrapper.Launch.main(Launch.java:18)

A detailed walkthrough of the error, its code path and all known details is as follows:

-- Head --
Stacktrace:
at invtweaks.forge.InvTweaksMod.setTextboxModeStatic(InvTweaksMod.java:74)
at net.minecraft.client.gui.GuiTextField.func_73796_b(SourceFile:437)
at net.minecraft.client.gui.GuiCreateWorld.func_73866_w_(GuiCreateWorld.java:123)
at net.minecraft.client.gui.GuiScreen.func_73872_a(SourceFile:94)
at net.minecraft.client.Minecraft.func_71373_a(Minecraft.java:730)
at net.minecraft.client.gui.GuiSelectWorld.func_73875_a(SourceFile:124)
at net.minecraft.client.gui.GuiScreen.func_73864_a(SourceFile:69)
at net.minecraft.client.gui.GuiScreen.func_73867_d(SourceFile:128)
at net.minecraft.client.gui.GuiScreen.func_73862_m(SourceFile:107)

-- Affected screen --
Details:
Screen name: net.minecraft.client.gui.GuiCreateWorld
Stacktrace:
at net.minecraft.client.Minecraft.func_71407_l(Minecraft.java:1564)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:908)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:836)
at net.minecraft.client.main.Main.main(SourceFile:101)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:57)
at net.minecraft.launchwrapper.Launch.main(Launch.java:18)

-- System Details --
Details:
Minecraft Version: 1.6.2
Operating System: Windows 8 (amd64) version 6.2
Java Version: 1.7.0_45, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 499527040 bytes (476 MB) / 1344274432 bytes (1282 MB) up to 2863661056 bytes (2731 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx3G
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
Suspicious classes: FML and Forge are installed
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v8.04 FML v6.2.62.871 Minecraft Forge 9.10.1.871 Optifine OptiFine_1.6.2_HD_U_C4 54 mods loaded, 54 mods active
mcp{8.04} Minecraft Coder Pack Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
FML{6.2.62.871} Forge Mod Loader Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
Forge{9.10.1.871} Minecraft Forge Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
CodeChickenCore{0.9.0.5} CodeChicken Core Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
NotEnoughItems{1.6.1.4} [Not Enough Items](NotEnoughItems 1.6.1.4.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
jammyfurniture{4.5} Jammy Furniture Mod Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
EnhancedBooks{1.7.2} [Enhanced Books]([1.6.2] Enhanced Books v1.7.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
mod_ReiMinimap{v3.4_01 [1.6.2]} mod_ReiMinimap Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
craftablespawners{2.0} [Craftable Spawners]([1.6.4] Craftable-Spawners-2.0.3-1.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
mod_WheatPlanter{1.5} mod_WheatPlanter Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
Backpack{1.22.25} Backpack Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
barrels{3.3.2} [The Barrels Mod](Barrels 3.3.2 - 1.6.4.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
BiblioCraft{1.5.4} BiblioCraft Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
mod_Biosphere{1.6.2} mod_Biosphere Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
BuildCraft|Core{4.1.2} BuildCraft Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
BuildCraft|Builders{4.1.2} BC Builders Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
BuildCraft|Energy{4.1.2} BC Energy Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
BuildCraft|Factory{4.1.2} BC Factory Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
BuildCraft|Transport{4.1.2} BC Transport Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
BuildCraft|Silicon{4.1.2} BC Silicon Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
Additional-Buildcraft-Objects{1.0.6.182} Additional Buildcraft Objects Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
CarpentersBlocks{v1.9.8} Carpenter's Blocks Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
ChickenChunks{1.3.3.2} [ChickenChunks](ChickenChunks 1.3.3.2.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
IC2{2.0.305-experimental} IndustrialCraft 2 Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
CompactSolars{4.4.11.114} Compact Solar Arrays Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
mraxzipcraftable{1.2} [Craftable Items & Blocks](CraftableItems&Blocks - 1.2.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
EnderStorage{1.4.3.3} [EnderStorage](EnderStorage 1.4.3.3.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
ExtraUtilities{1.0.1} Extra Utilities Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
Forestry{2.3.0.7} Forestry for Minecraft Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
GraveStone{2.4.1} GraveStone Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
GregsLighting{1.9.0} Greg's Lighting Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
IronChest{5.3.14.512} Iron Chest Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
LavaBoat{2.0.0} LavaBoat Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
mod_MAtmos{r25 for 1.6.2} mod_MAtmos Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
AdvancedSolarPanel{3.3.10} Advanced Solar Panels Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
more-pistons{X.X.X for [1.6.2 Build By: Master801]} More Pistons Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
MoreFurnaces{1.3.5} More Furnaces Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
NEIPlugins{1.1.0.6} NEI Plugins Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
ForgeMultipart{1.0.0.171} Forge Multipart Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
ProjRed|Core{4.0.1.4} Project: Red-Core Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
ProjRed|Compatability{4.0.1.4} ProjectRed-Compatability Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
ProjRed|Integration{4.0.1.4} ProjectRed-Integration Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
ProjRed|Transmission{4.0.1.4} ProjectRed-Transmission Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
ProjRed|Exploration{4.0.1.4} ProjectRed-Exploration Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
ProjRed|Illumination{4.0.1.4} ProjectRed-Illumination Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
Railcraft{8.2.0.0} Railcraft Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
mod_SpawnerGUI{1.6.2} [mod_SpawnerGUI](Spawner GUI.zip) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
thorinmod{Version 1.0} Thorin Mod Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
Waila{1.4.2} Waila Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
WR-CBE|Core{1.4.0.5} [WR-CBE Core](WR-CBE 1.4.0.5.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
WR-CBE|Addons{1.4.0.5} [WR-CBE Addons](WR-CBE 1.4.0.5.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
WR-CBE|Logic{1.4.0.5} [WR-CBE Logic](WR-CBE 1.4.0.5.jar) Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
McMultipart{1.0.0.171} Minecraft Multipart Plugin Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
ForgeMicroblock{1.0.0.171} Forge Microblocks Unloaded->Constructed->Pre-initialized->Initialized->Post-initialized->Available
Launched Version: 1.6.2-Forge9.10.1.871
LWJGL: 2.9.0
OpenGL: Intel(R) HD Graphics 4600 GL version 4.2.0 - Build 10.18.10.3379, Intel
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Pack: Soartex Fanver 1.6.x.zip
Current Language: Deutsch (Deutschland)
Profiler Position: N/A (disabled)
Vec3 Pool Size: ERROR NullPointerException: null

The mod is installed incorrectly (or an old version), especially since it is not listed at all on the list of loaded mods.