Tekkit opens to Mojang then closes

[HypnoCow]

Title: Tekkit opens to Mojang then closes

Version: 3.1.2

OS: Windows 7 Home Professional x64

Java Version: Java 7 Update 11

Description of Problem:

Tekkit opens up the the mojang screen then shortly after closes, have tried multiple versions of Java and have tried uninstalling java, technic pack, minecraft and reinstalling to no avail.

I don't have much/any experience with Java but my default minecraft was having a similar issue that i fixed with some guy onlines method and he set up a batch file that launched it with -Djava.net.preferIPv4Stack=true in the batch and so,e stuff pointing it to minecraft, Tekkit and my default minecraft stopped working at the same time, could these be related? And if so how would i apply this fix to tekkit? (Sorry if i sound REALLY dumb like i said i have NO experience with java and can only guess by my knowledge of HTML which really much help here.)

Error Messages:

None

Error Log:

[17:42:11] [sEVERE] at java.lang.Thread.run(Unknown Source)

[17:42:12] [sEVERE] Loading Launcher from 'techniclauncher/tekkit'

[17:42:20] [sEVERE] Attempting early MinecraftForge initialization

[17:42:20] [sEVERE] Completed early MinecraftForge initialization

[17:42:20] [sEVERE] 2013-01-14 17:42:20 [iNFO] Forge Mod Loader version 2.2.106.176 for Minecraft c:1.2.5, s:1.2.5 loading

 

[17:42:20] [sEVERE] 2013-01-14 17:42:20 [iNFO] Forge Mod Loader has detected optifine OptiFine_1.2.5_HD_S_C6, enabling compatibility features

 

[17:42:21] [sEVERE] 2013-01-14 17:42:21 [iNFO] Loading mods from \tekkit\mods

 

[17:42:21] [sEVERE] 2013-01-14 17:42:21 [iNFO] Directory ccSensors contained no mods

 

[17:42:21] [sEVERE] 2013-01-14 17:42:21 [iNFO] File NEI_RailCraftPlugin 1.2.2.zip contained no mods

 

[17:42:21] [sEVERE] 2013-01-14 17:42:21 [iNFO] File NEI_RedPowerPlugin 1.2.2.3.zip contained no mods

 

[17:42:21] [sEVERE] 2013-01-14 17:42:21 [iNFO] Directory rei_minimap contained no mods

 

[17:42:21] [sEVERE] 2013-01-14 17:42:21 [iNFO] Directory weaponmod contained no mods

 

[17:42:21] [sEVERE] 2013-01-14 17:42:21 [iNFO] Forge Mod Loader has loaded 41 mods

 

[17:42:21] [sEVERE] 2013-01-14 17:42:21 [iNFO] MinecraftForge v3.3.8.164 Initialized

 

[17:42:22] [sEVERE] 2013-01-14 17:42:22 [WARNING] Configuration for mod_ComputerCraft.enableAPI_http found value 0 outside acceptable range 4.9E-324,1.7976931348623157E308

 

[17:42:22] [sEVERE] 2013-01-14 17:42:22 [iNFO] [WeaponMod] Properties file read succesfully!

 

[17:43:44] [sEVERE] ------------------------------------------

[17:43:44] [sEVERE] Launcher is starting....

[17:43:44] [sEVERE] Launcher Build: '1.1.1.0'

[17:43:44] [sEVERE] Allocated 989.875 Mb of RAM

[17:43:44] [sEVERE] Java VM: '1.7.0_11-b21'

[17:43:44] [sEVERE] OS Version: '6.1'

[17:43:44] [sEVERE] Is 64-bit: 'false'

[17:43:45] [sEVERE] [info] Downloading 'mirrors.yml' from 'http://mirror.technicpack.net/Technic/mirrors.yml'.

[17:43:46] [sEVERE] Downloading 'http://mirror.technicpack.net/Technic/CHECKSUM.md5'

[17:43:46] [sEVERE] Downloaded '\launcher\CHECKSUM.md5'

[17:43:46] [sEVERE] [MD5 Mismatch] File '\launcher\tekkit\modpack.yml' has md5 of 'ca30c067722eb6748ed100bcd582daf1' instead of '910c96355b9a539cb83cec3f4e48e517'

[17:43:46] [sEVERE] [info] Downloading 'modpack.yml' from 'http://206.217.207.1/Technic/tekkit/modpack.yml'.

[17:43:46] [sEVERE] [info] Downloading 'minecraft.yml' from 'http://206.217.207.1/Technic/minecraft.yml'.

[17:44:05] [sEVERE] Rebooting with [java, -Xmx1536m, -jar, "C:/Users/HypnoCow/Desktop/technic-launcher.jar"]