OpenSuSE 103, display prob.??

It won’t go to 800x600, I choose that in sax2 & it sayd “graphics system has to be restarted”, but it doesn’t go to 800x600 when I reboot. I have trouble seeing text, so I need help on the display issue. I had to update it with the dvd to get grub back, my floppy is dead, it was at 800x600 before I lost grub. Sax2 doesn’t say 800x600 when I choose that & got to test it. So sup?