Help cant play attack of the b-team

[jimmytan]

So when i press play to play attack of the b-team my technic launcher goes away and then comes back again and it keeps going on like that. I already tried to reset the pack multiple times but it didnt work.

[Loader]

Update Java (to version 1.7) then try again, if it still doesn't work please post your logs on the tracker, useful links are in my sig.