Sisuveli

Can not load SL on my laptop, Dell Latitude D620, says video driver, Intel 945GM, is not compatible. I have reloaded the driver from Dell which did not help. I have been on SL with this laptop but it was about 6+ months ago. I am just a newbee so I deleted SL and then did a dl of the latest SL viewer. The same problem happened, video driver bad. Any ideas?