bit comet.exe has stop working...

I hope someone can help me I'm doing my best to write in English!

Everytime I try to download with BitComet it open a second BitComet and a message appear saying that bit comet has stop working and windows will closed the program..

I use FireFox, Windows 7,64bit.Bit Comet 64 Bit 1.35

I even tried with internet explorer and the same result


Please Help, I'm not a pro with computer!