Everything was perfect--until...

I try to launch FS2004 now I get the following message:
ERROR: Your computer has run out of available memory. Flight Simulator will now exit. You may not have enough free space on your hard drive. Run Disc cleanup to free up space and then try running flight simulator again
I have rebuilt the pagefile and edited the app for the "App can handle> 2gb adressest" fix. I have defragged per NickN's directions. I have 205gb left on a 300gb drive. I am not out of memory.
What else could this be? I have spent 3 days reinstalling and setting up FS9 now because of the major issues with FSX I had. Now this. I'm about ready to throw in the towel!
Please help. I can't do anything at this point.
ERROR: Your computer has run out of available memory. Flight Simulator will now exit. You may not have enough free space on your hard drive. Run Disc cleanup to free up space and then try running flight simulator again
I have rebuilt the pagefile and edited the app for the "App can handle> 2gb adressest" fix. I have defragged per NickN's directions. I have 205gb left on a 300gb drive. I am not out of memory.
What else could this be? I have spent 3 days reinstalling and setting up FS9 now because of the major issues with FSX I had. Now this. I'm about ready to throw in the towel!
Please help. I can't do anything at this point.