It is possible that the registry settings for the profile in question got corrupted. If you have access to another machine with the same profile settings you can export the profile from there, then delete the profile from the problem machine, and re-import it.
HTH,
Martin Schmid
Autodesk Consulting
Martin Schmid
Product Line Manager
Mechanical Detailing and Electrical Design
Architecture, Engineering, and Construction
Autodesk, Inc.