if i type : /tc spawn [Bo2] name
An inernal error occurred while attempting to perform this command
and in the server log is writen:

2013-03-05 21:43:43 [INFO] Aurazara issued server command: /tc spawn mymini_palm
2013-03-05 21:43:43 [SEVERE] null
org.bukkit.command.CommandException: Unhandled exception executing command 'tc' in plugin TerrainControl v2.3.7
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:46)
at org.bukkit.command.SimpleCommandMap.dispatch(SimpleCommandMap.java:186)
at org.bukkit.craftbukkit.v1_4_R1.CraftServer.dispatchCommand(CraftServer.java:514)
at net.minecraft.server.v1_4_R1.PlayerConnection.handleCommand(PlayerConnection.java:980)
at net.minecraft.server.v1_4_R1.PlayerConnection.chat(PlayerConnection.java:898)
at net.minecraft.server.v1_4_R1.PlayerConnection.a(PlayerConnection.java:853)
at net.minecraft.server.v1_4_R1.Packet3Chat.handle(Packet3Chat.java:44)
at net.minecraft.server.v1_4_R1.NetworkManager.b(NetworkManager.java:290)
at net.minecraft.server.v1_4_R1.PlayerConnection.d(PlayerConnection.java:113)
at net.minecraft.server.v1_4_R1.ServerConnection.b(SourceFile:39)
at net.minecraft.server.v1_4_R1.DedicatedServerConnection.b(SourceFile:30)
at net.minecraft.server.v1_4_R1.MinecraftServer.r(MinecraftServer.java:598)
at net.minecraft.server.v1_4_R1.DedicatedServer.r(DedicatedServer.java:224)
at net.minecraft.server.v1_4_R1.MinecraftServer.q(MinecraftServer.java:494)
at net.minecraft.server.v1_4_R1.MinecraftServer.run(MinecraftServer.java:427)
at net.minecraft.server.v1_4_R1.ThreadServerApplication.run(SourceFile:849)
Caused by: java.lang.NullPointerException
at com.khorn.terraincontrol.customobjects.CustomObjectGen.GenerateCustomObject(CustomObjectGen.java:144)
at com.khorn.terraincontrol.bukkit.commands.SpawnCommand.onCommand(SpawnCommand.java:62)
at com.khorn.terraincontrol.bukkit.commands.TCCommandExecutor.onCommand(TCCommandExecutor.java:44)
at com.khorn.terraincontrol.bukkit.TCPlugin.onCommand(TCPlugin.java:63)
at org.bukkit.command.PluginCommand.execute(PluginCommand.java:44)
... 15 more
and the Terrain generator also does not generate my Bo2 files. . :(

what am i doing wrong ?
pls help me

The stacktrace is a duplicate of #113, possibly already fixed in the dev builds.

I guess that you mean that TC doesn't generate the BO2s itself, and not the files? TC never autocreates the BO2 files for you, you have to create the files yourself (with an external editor). BO2s work, many people have showed their maps. Maybe you can download something from here to get you started?