After Rebuild, FSX does not see GTX470

I was forced to rebuild my FSX machine. I normally run FSX into a GTX470 and tripple head to go for an outside view and a GTX 460 for instrument panels. During the install, I had the GTX470 unpluged(th2go monitor cable) and was using only the GTX 460 and the instrument panel monitors during the install. I beleive this created a problem where FSX does not see the GTX 470 and thus starts up, runs but with no display. When I go to the Options>Display menu, only the GTX 460 is listed.I want to check in with you guys before I move forward. I was planning to disconnect the GTX 460 leaving only the GTX470 and the tripple head to go system active before I start FSX again in an attempt to force FSX to recognize the 470.What do you all think? Do you have a better solution?