[Plugin: Online Backup for WordPress] Error Message re: parent folder path

I’m getting an error when I try to back up:

“Failed to resolve the WordPress parent folder path, : An error happened at: wp-db.php(1125) mysql_free_result(): supplied argument is not a valid MySQL result resource.”

So it looks like something might be wrong in my database, but I have no idea what that would be. I went in there and looked around, but didn’t see anything obvious. I don’t have much experience with databases, so I don’t want to muck around without knowing what I’m doing. And I’m not even 100% sure that’s the problem.

Has anyone seen this error before? It looks like my database was backed up, but not the other files that should have been. So I guess it can’t access the other files for some reason?

Thanks!
Deb

http://wordpress.org/extend/plugins/wponlinebackup/