FSX and Nvidia 3d Vision

Greetings all. I have an Intel Quad processor on an Intel DP43TF board, 4Gig RAM, together with an Asus EN9600GT card with 1Gig memory. OS is Vista 32.When I try to start FSX in 3d mode, the error message "Out of memory. Stereo has been turned off." appears and the sim reverts to non-3d mode.FS9 is OK, in fact very good indeed, as is Combat FS3. I can't get CFS 2 to work either.I have also installed Windows 7 on a clean sata disk, with 3D Vision installed and I have the same problem with FSX.I would be really grateful if someone could come up with an answer (or a clue as to the cause).Thanks, Ade