Matrox G550 and Bentley PowerDraft problem

Hi everybody.

I'm using Matrox Millenium G550 graphic card on Windows XP Professional with
Bentley Power Draft Version 08.01.02.20 and I have some problem with this
application. Sometimes all icons and menues are dissapeard and when I
minimaize this application on taskbar and take it back, everything goes back
to normal, but not for a long time. I've downloaded the latest drivers but
it doesn,t work. I have the newest bios too. Have anybody got any
information about this kind of problem? I will be gratefull for any help.

Best regards
Slawek.