I already started a thread in the DX10 forum but it explains the problem pretty well

 

http://www.avsim.com/topic/474513-dx10-anti-aliasing-keeps-resetting/#entry3293553

when you change the AA level in the GUI it writes it into fsx.cfg.  The GUI then displays what is in fsx.cfg

 

NVI has no bearing on this.

 

If you have changed GPU there may be multiple device entries in your fsx .cfg

 

I would clean all the device group entries out of it and then try

 

they are of the form

 

[DISPLAY.Device.Nvidia GeForce GTX xxx.0.0]  

item=value

etc

Yep, your right that did the trick, I still had the old GPU entries in there and once removed the fixer is working okay again. Thanks :-)

Good news!