New PA-28 Piper Arrow III...probs?

Hello all...
...!
I have downloaded the new Piper arrow....
http://www.simviation.com/fs2002props48.htm
Installed everything OK, as usual....
but....
...the frame rates using the plane have now dropped from the usual 35fps to around 1fps, (or less).....
...!
The plane stutters along for a while before the program fails completely with the usual Microsoft warning that there is a problem with the program and to post them the details via the problem window...
Has anyone else had this problem with the new Arrow...?
Many thanks...
...!
Cheers all...
...!
Paul.
(England).

I have downloaded the new Piper arrow....
http://www.simviation.com/fs2002props48.htm
Installed everything OK, as usual....
but....
...the frame rates using the plane have now dropped from the usual 35fps to around 1fps, (or less).....

The plane stutters along for a while before the program fails completely with the usual Microsoft warning that there is a problem with the program and to post them the details via the problem window...
Has anyone else had this problem with the new Arrow...?
Many thanks...

Cheers all...

Paul.
(England).