Bc2000 (for the BCF2000 & BCR2000)

Hi, I have a problem with my bcd-2000, it seems to work just fine on
my desktop pc, no latency problems or anything.But sometimes it shuts
my computer instantly when I press a button or move a slider.
I couldn't figure out what's causing this. Has anyone encountered this
problem?

I'm using a 1,9 Ghz AMD Athlon, 512 Mb RAM and Dj Traktor 3 + Midi
Rules and Midi Yoke.