saving in Color app. dumps the program

G5 quad core Final Cut 6.0.2 10gb ram

When I do a manual save while in Color it just dumps the program. Even auto save doesn't work.
All Color files are stored on the internal hard drive, and cannot see how to assign the project files to the external drive where all my FCP Project and media files are stored. Is that a problem?
There is room on all drives have room to save files. It was saving before, so I thought the Color preferences may be corrupt so dumped them, but it still dumps when I say save. Don't think it could be FCP preferences.

Any ideas?

Thanks

bill