Error While Saving

After integrating audio into a Captivate project and attempting to save, I get this error message:

"You do not have permission to save to this folder or this was created by another user and you don't have permissions to save it. Try saving the file with a new name."

I'm the only one w/ access to Captivate 2, and the only one with the software open, does anyone know why this is happening, and if there is a fix?

This seems to be happening a lot, and been loosing a lot of work. I have even tried a work around, by copying my project and pasting into a new captivate project, and they do not copy over.