Problem with Graphics

[likeapear]

Hi, I'm new to linux. I'm trying Knoppix. Its great! But I have one problem with graphics. After ever mouse click (for example on toolbar button in konqueror), is part of window uncorrectly repainted.
I have PII 450 MHz and Diamond Stealth graphics card with 8MB RAM.
Thanks for any answers.

[likeapear]

Nobody can help me?
I try to better specify problem: The card is Diamond Stealth II G460 8MB RAM. Desktop (or window) is uncorrectly repainted when I draging a window.
Please...

[Stephen]

Nobody can help me?
I try to better specify problem: The card is Diamond Stealth II G460 8MB RAM. Desktop (or window) is uncorrectly repainted when I draging a window.
Please...

You could try typing in knoppix xmodule=vesa xvrefresh=60 then enter at the Knoppix screen when you boot.