Cant Add modpacks or Use Installed Ones

[UB43]

Launcher Version: Latest reccomended

Operating System: Windows 7

Java Version: 7

Antivirus Program: Microsoft security essentials

Description of Problem:

Cant Add modpacks or Use Installed Ones.

says error parsing platform response or dosent let me update current packs.

Error Messages:

Error parsing platform response. Or no update.

Error Log:

No Errors in log.