Have tried every suggestion. Nothing makes a difference. Whether my FSX is cranked up to maximum settings or dropped to minimum settings, the 727 still stutters along at 4 - 5 fps. I suspect it is the VC. Maybe 64 bit & Windows 7 just don't get along with CS.
Thanks for all the advice. I think I might just have to turf the 727. Have asked CS but they just refer me to the Knowledge base and nothing there which helps. Cheers