Updated to v4.0.0 (non-beta) and the game comes up with this when I try to run it:
---- Minecraft Crash Report ----
// Shall we play a game?

Time: 21/03/14 10:55 PM
Description: There was a severe problem during mod loading that has caused the game to fail

cpw.mods.fml.common.LoaderException: java.lang.ClassNotFoundException: mca.core.MCA
at cpw.mods.fml.common.LoadController.transition(LoadController.java:163)
at cpw.mods.fml.common.Loader.loadMods(Loader.java:494)
at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:201)
at net.minecraft.client.Minecraft.func_71384_a(MinecraftOverlay.java:498)
at net.minecraft.client.Minecraft.func_99999_d(MinecraftOverlay.java:853)
at net.minecraft.client.main.Main.main(SourceFile:103)
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:134)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)
Caused by: java.lang.ClassNotFoundException: mca.core.MCA
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:188)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at cpw.mods.fml.common.ModClassLoader.loadClass(ModClassLoader.java:58)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Unknown Source)
at cpw.mods.fml.common.FMLModContainer.constructMod(FMLModContainer.java:443)
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 com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
at com.google.common.eventbus.EventBus.post(EventBus.java:267)
at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:209)
at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java:188)
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 com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:47)
at com.google.common.eventbus.EventBus.dispatch(EventBus.java:314)
at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
at com.google.common.eventbus.EventBus.post(EventBus.java:267)
at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:119)
at cpw.mods.fml.common.Loader.loadMods(Loader.java:484)
... 10 more
Caused by: java.lang.NoClassDefFoundError: com/radixshock/radixcore/core/UnenforcedCore
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:180)
... 38 more
Caused by: java.lang.ClassNotFoundException: com.radixshock.radixcore.core.UnenforcedCore
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:99)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 43 more

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

-- System Details --
Details:
Minecraft Version: 1.7.2
Operating System: Windows 7 (amd64) version 6.1
Java Version: 1.6.0_26, Sun Microsystems Inc.
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Sun Microsystems Inc.
Memory: 40534552 bytes (38 MB) / 459079680 bytes (437 MB) up to 954466304 bytes (910 MB)
JVM Flags: 2 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G
AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
FML: MCP v9.01-pre FML v7.2.125.1039 Minecraft Forge 10.12.0.1039 12 mods loaded, 12 mods active
mcp{8.09} Minecraft Coder Pack Unloaded->Constructed
FML{7.2.125.1039} Forge Mod Loader Unloaded->Constructed
Forge{10.12.0.1039} Minecraft Forge Unloaded->Constructed
battlegear2{1.0.5.0} [Mine & Blade Battlegear 2 - Bullseye]([1.7.2] Mine & Blade Battlegear 2 - Bullseye - 1.0.5.1.jar) Unloaded->Constructed
bspkrsCore{6.0(1.7.2)} bspkrsCore Unloaded->Constructed
ArmorStatusHUD{1.18(1.7.2)} ArmorStatusHUD Unloaded->Constructed
DamageIndicatorsMod{3.0.8} Damage Indicators Unloaded->Constructed
dynamicswordskills{1.7.2-1.1} Dynamic Sword Skills Unloaded->Constructed
inventorytweaks{1.57-dev-110} Inventory Tweaks Unloaded->Constructed
radixcore{0.9.0.Beta} [RadixCore](RadixCore-0.9.0.Beta MC-1.7.2.zip) Unloaded->Constructed
mca{4.0.0} [Minecraft Comes Alive](MCA-4.0.0 MC-1.7.2.zip) Unloaded->Errored
villagegen{1.0.0 for MC 1.7.2} [Village Gen](Village Gen-1.0.0.zip) Unloaded->Constructed

Try installing Forge 10.12.0.1024 and reinstalling MCA.

Ah, found the issue now, sorry. It wasn't Forge that was the wrong version, it was RadixCore. I didn't download the new one because I assumed 1.0.0 was the first version.