Hi,
If the AMD A8 has no RVI support then it isn't going to work, but a few links via google seem to suggest that at least some of the A8 processors have RVI/SLAT support. As you don't give a specific processor number it is hard to find (haven't used AMD processors myself for the last decade, so my knowledge about them is hopelessly out of date)
Make sure that virtualisatoin is enabled in the BIOS/Firmware.
--
Wil
