1.6.4 packs java exception

[sportsmanb21]

Every time i launch a 1.6.4 pack it tries to launch then says java virtual maahcine launcher a java exception has occured. how do i fix this
Pastbin: http://pastebin.com/vzGFW215

 

[JamiePhonic]

this is only the launcher log, which shows no errors. find the modpack log or even the java one. in the event of a crash, you are usually informed somewhere in the first few lines of the crash screen where the full log is saved