Possible FSX config corruption causing Monitor Issues?

I sure hope, desperately, that someone can help overcome this very recent problem I've been having. Perhaps there are those out there that can relate having had similar problems, or someone may have a knowledge of the workings of FSX and it's technical attributes when it comes to hardware. This problem has just recently cropped up since the weekend. Up until then, I had no issues as described below. It was only after I installed a demo copy of the recently released demo of Ship Simulator Extremes, which has already been uninstalled.

My system, well ... the specs are below in my signature. I have the two GFX 560ti cards in SLI to produce a surround display (spanned) across the three 23" acer monitors. The 4th monitor, a 15" acer is driven from a 3rd independent card, a GeForce 8500. The SLI configuration was accomplished successfully using the NVIDIA control panel, and has a recommended resolution of 5760x1080 (this is also the resolution I have FSX set at). The 4th monitor, which I use as a support monitor to display charts, gauges, FSC9 and the ActiveSky application was set up through the NVIDIA control panel as a multiple monitor. It represents display 2, and has a resolution of 1440x900. All graphics cards have been updated to the current Nvidia 296.10 drivers for the 64Bit Windows 7 platform. Under general use of this system, everything works properly. As I write this, my browser is (annoyinging) spanned out across three monitors, and the 4th monitor is active.

Here's the problem. When I run FSX, it properly spans, but the 4th monitor blanks out. It remains alive, but there is no display. I can move the cursor to that monitor and see it, but none of the applications remain visible. Another oddity is the loss of the menu bar. It's being defaulted to off ... when historically, it defaulted on, which is preferred. When I activate FSInn to use for VATSIM flying, the FSX display vanishes to the spanned desktop, and low and behold, the 4th monitor fires up a display. Attempts to regain FSX after FSInn goes through it's thing is futile with random phases of black screen and desktop, the 4th monitor blacking out, or displaying grossly exaggerated resolutions of the applications it maintains. Eventually, CTRL-ALT-DEL to the task manager is the only way to recover. So, this problem was first discovered at the beginning on the week, and it frustrated me (and apparently continues to). I had uninstalled the Ship Simulator, including it's DirectX install (which was prompted during the uninstall) . Having not resolved the problem, I restored a previous point in my computer history before the ship install. Still no resolution. I uninstalled the graphic card device driver, and reinstalled with the current beta version for the 500 series cards. No change, so I reverted back to the original. Again, no resolution.

I wandered over to the folder in which my FSX.cfg file resides. It was current to todays date, so obviously it had been updated to some degree. Just for kicks, I resurrected an archived copy of FSX.cfg that was there (a backup). Low and behold, everything worked exactly as it had it the past. I had chalked it up to corrupt FSX.cfg file. Boy was I a happy flyer again.

Until! I'm on the tarmac doing my pre-taxi checks ... VC spanned across my main surround monitor, checklist, connected FSInn panel, and FSC9 display plotted out on my 4th monitor when bam!! Screens blacked out for a second, recovered ... but with the 4th monitor blanked out, and yup ... the Menu Bar hidden. Back to the same problem again. The only difference, I no longer have the FSX.cfg back-up file.

I'm stumped as to what the problem is. FSX, or something, is doing something to the config file is my only guess, and without the backup, its hard to say what.

Please, if anyone has any suggestions, I extend my appreciation now for any efforts to help me resolve this problem.