Custom Modpack launches into white-screen after Mojang

[J3d247]

Launcher Version: Latest: Build 253

Operating System: Windows 7 Ultimate

Java Version: Version 7 Update 25 (64bit)

Antivirus Program: BitDefender

Description of Problem:

Have just put together a modpack for some friends on request.

However when i launch it i get the whitescreen after mojang.

I have a feeling it is related to a mod installed incorrectly, however am unsure as to which it is.

Any ideas? (Really dont want to have to go one by one trial and error )

Error Messages:

Error Log:

launcher: http://pastebin.com/9rvP8sDR

Modpack log: http://pastebin.com/MSM2TbVh

[Jvenom]

Same issue. fml shows up gets to 100% and then closes and im left staring at this white screen. fire wall is disabled. i uped ram usage. permgen size increased. what am i missing?