Sorry I havent been active for the past week or two, serious internet problems.
Anyway, I want to get dual monitors. (Two monitors for the mentally challenged

Before I get into any more detail, I just need this question answered. If you have one of them Video Cards with dual DVI then you just plug both of the monitors up to the computer, change the display settings and have dual monitors, I did that by using an old CRT monitor from my old computer and I tested it out and everything worked fine, except...
I started up FSX, put it in full screen, and on one monitor I would get a flash every two seconds of the game and on the other monitor it was black. Do I need to get an adapter of some sort like that Dual-Head thing by Matrox or anything, or do I need to change settings?
Thanks,
Virtual_Pilot