Error on commit - trying to save with a comma in filename

[henrygillam]

The exact error states:
sample_project: cvs [commit aborted]: cannot rename file /var/lib/cvsroot/sample_project/another_dir/,file3, to /var/lib/cvsroot/sample_project/another_dir/file3,v: Operation not permitted

It seems to be trying to add a comma to the filename when I commit it. Has anybody else had problems with this before? I just started working with cvs and so this error has kept me from ever committing any of my files.

Any help in this regard would be greatly appreciated!