If its ATI try turning off Anti-Alasing in the drivers options. That worked for me.
If you don't know what you card is, I suggest you find out as it's very hard to help you troubleshoot it, when we don't know what we are dealing with.
And also just so you know, I have personally never ever had the Windows XP compatibility mode work for me on anything. I'm not saying it doesn't work, but if it does it's not that reliable, nor was it meant to be.
It also helps (at least it helps me) if you at least try to write in proper english. It's very hard to read your writing as it is.