Driver for SW 2011 x64 Vista x64 FX1800 card

I am having graphic issues since we up graded to SW 2011 X64.

Previous to that we were running 2010 X64 on the same OS & Box.

SolidWorks has no certified driver for 2011 X64 running on Dell T3500 with Vista X64 and Quatro FX 1800 vidio card.

Has anyone found a suitable driver for this combination?

Right now I am running 7.15.11.8265

Regards,

SolidworksGeneral