Graphics Card Help

Hi AllI hope there is someone who can advise on this issue that I have.I have 2 Nvidia 7800GTX SLI graphic cards installed. When I go to my settings in the Nvidia control panel to up my settings, Antialiasing and anistropic filtering from application controlled to the cards control, load up FS9 and something like PMDG 747 or PSS 777. After a few moments I get split views in analogue and eventually VC panels and my sub panels are outside the main panels. When I take my settings off and re-load FS9 these are fine but Scenery airports like Gatwick pro or Heathrow pro and the likes my runway markings and distant buildings seem to have a flashing effect but not when change my settings.What am I doing wrong?Any help would be very much appreciaredMy SystemMotherboard:A8N-SLI DeluxeCPU:AMD 64FX-57 ProcessorRam: 2GbGraphics:2 x Geeforce Nvidia 7800 GTX SLIHDD: 4 x 300Gb Maxtor drives