Problem Initializing

[THEAVENGE]

Title: Problem Initializing

Version: 3.1.2

OS: W7 ultimate (32bits)

Java Version: Java 7

Description of Problem:

The first time that I use the launcher to play tekkit everything was good but then I put other mod pack then I return to my tekkit and when I tried to start it always says that an error ocurried and I cant figure out what is happenning

Error Messages:

Minecraft has crashed!

----------------------

Minecraft has stopped running because it encountered a problem.

--- BEGIN ERROR REPORT c117c2ae --------

Generated 11/01/12 02:23 PM

Minecraft: Minecraft 1.2.5

OS: Windows 7 (x86) version 6.1

Java: 1.7.0_07, Oracle Corporation

VM: Java HotSpot Client VM (mixed mode), Oracle Corporation

LWJGL: 2.4.2

OpenGL: GeForce 8400GS/PCIe/SSE2 version 3.3.0, NVIDIA Corporation

java.lang.NullPointerException

at java.util.Hashtable.put(Unknown Source)

at forge.MinecraftForge.setGuiHandler(MinecraftForge.java:1107)

at mod_CompactSolars.load(mod_CompactSolars.java:34)

at cpw.mods.fml.common.modloader.ModLoaderModContainer.init(ModLoaderModContainer.java:356)

at cpw.mods.fml.common.Loader.modInit(Loader.java:273)

at cpw.mods.fml.common.Loader.initializeMods(Loader.java:628)

at cpw.mods.fml.client.FMLClientHandler.onLoadComplete(FMLClientHandler.java:223)

at net.minecraft.client.Minecraft.a(Minecraft.java:429)

at net.minecraft.client.Minecraft.run(Minecraft.java:738)

at java.lang.Thread.run(Unknown Source)

--- END ERROR REPORT d25d0f26 ----------

Error Log:

[Magister]

what mods did you try to add in?

if you added multiples you may want to remove them and then add them one at a time starting after each is added till you find which is causing the issue