Ati radeon express 200 is an old onboard chip. There are no Win 7 drivers listed under 'embedded' on the ATI driver site for the ATI Radeon Express 200. That onboard chip is not compatible with Windows 7. If your MB has a PCIE slot, perhaps install a suitable graphics vard in the slot.
The Radeon express 200 driver is listed here under 'embedded'. XP driver only.http://support.amd.com/us/gpudownload/Pages/index.aspx
EDIT: I noticed there are Vista drivers for the RE 200 integrated chipset. Try those. Vista>Integrated>radeon Express 200.