FS9 Stops Loading, not responding

I'm back with a new problem, well at least new for me.
A few days ago I read on a forum that if you switch your memory usage from "Programs to System cache", that FS9 would reload faster. This would be useful when using AFCAD, and having to reload to see if the changes where right or not.
The problem is that after changeing the memory to system cache, FS9 will now start to load, the splach screen comes up and then FS9 stops responding, and I have to use task maneger to end FS9.
I've switch back to program cache, uninstalled/reinstalled FS9 and vid drivers (update) several times and still can't get FS9 to load.
I've done a viruse scan, defrag the drive and still no go. FS2k2 is and has been working just fine doing all this on the same h/d.
Is there anything I have overlooked or not done that might help?
A few days ago I read on a forum that if you switch your memory usage from "Programs to System cache", that FS9 would reload faster. This would be useful when using AFCAD, and having to reload to see if the changes where right or not.
The problem is that after changeing the memory to system cache, FS9 will now start to load, the splach screen comes up and then FS9 stops responding, and I have to use task maneger to end FS9.
I've switch back to program cache, uninstalled/reinstalled FS9 and vid drivers (update) several times and still can't get FS9 to load.

I've done a viruse scan, defrag the drive and still no go. FS2k2 is and has been working just fine doing all this on the same h/d.
Is there anything I have overlooked or not done that might help?