cubase 6 closing???

hi i have regestered my cubase 6 with steinberg and it even says i have when i log in! every time i open halion sonic se keyboard and chose a sound, when i hit the x to close halion cubase just shuts down and a messege appears saying cubase has occured a problem, its so annoying i have triied eerything to resolve it but nothing works has anybody got any ideas before it gets the bin?
thanks jonathan k.

Aloha chiptune and welcome to the board.

What hardware gear/OS are you using?
Any 3rd party stuff?


thanks for the welcome. im using a new mac book pro i bought just for music, it has an i5 processor, everything is new,

can anybody please help?