Photoshop CS4 hangs?

[marxx]

Hi all.

I have this problem whit PS CS4... Every time when I use example: Mask or crop tool application hangs! It just hangs and whole system is down until I reboot it!

All other bigger applications works just fine (i.e Cinema 4D).

My system is:

Distro: iPC OSx86 10.5.6 (latest)

Asus P5B mobo
4GB DDR2 RAM
Intel C2D E6300 @ 2.6Ghz
GF 7900 GTO 512Mb

Any ideas?

Thanks!