Unable To Launch Some Modpacks

[Eyeofstorms]

Launcher Version: 365

Operating System: Windows 7 Home Premium 64bit Build 7600

Java Version: 64bit version 7 update 45

Antivirus Program: AVG (currently Disabled)

Description of Problem:

I can NOT launch following mod packs

Tekkit

Hexxit

Voltz

Big Dig

i CAN launch

Tekkit Lite

Tekkit Classic

Yogbox

Hack/Mine

Vanilla

Error Messages:

error unzipping a file for the following pack: Voltz

invalid bit length repeat

Please consult the modpack author

Error Log:

no logs are being generated