Heya Dwayne,

I have had the very same issue occur.  The fix is very simple.  Go to Peter Dowson's webpage and download his excellent FSUIPC v3.30 program (if you don't already have it).  You can find it here (down at the lower part of the Webpage) if you don't have it:

[url]http://www.schiratti.com/dowson.html[/url]

Install it.

Myself, I purchased a registration because it offers more features, however, the unregistered version will fix your issue as well.

Startup FS 2004.  Load a Saved Flight.  Any Flight.  Press the Alt key to bring up the FS 2004 Main toolbar.  Up at the top you will see a new item called Modules.  Click on Modules, then FSUIPC.

The program will open with ten tabs at the top.
Click on the Technical Tab.  In the lower left corner you will see a series of checkboxes under the heading of "FS 2002/4 only".  Click a check into the box thats labeled "Fix Control Acceleration".  Click on the FSUIPC OK button at the bottom.  There you go.  Problem solved.

No problem.  Always glad to help.