I assume this is the same plane.

It has quite a few problems - nearly all in my view brought about because the people who designed it then went and used auto installers for everything.
When will these people ever learn - great work spolit by total and utter stupidity.
After getting the thing into FS9 I also found it had the 'flip over' problem. Like Ken I tried to install the FS9 patch but if you don't have it in the 'default' folder with the original folder name forget it (just crazy ???).
However, even by just putting in a default 737 air file it took off and flew not too bad. Bit like flying a truck, but it flew.
So I'd suggest that all you need to do after picking your way through the installation minefield that the designers have (unnecessarily) created for you is an overhaul of the plane's FDE.
Not as difficult as it sounds.
Edit
After a little bit of cfg file tweeking this is it cruising 350kts IAS 11000 ft KSFO to Edwards.

Wouldn't take much to sort it