Can't remove or change a directory

[James Pifer]

> > 
> This sounds interesting. What is the output of the mount command?
> What exactly is the command you are trying to use to
> remove/rename/etc it? (rm /tmp or /rm /mnt/tmp?) Did you know that
> to remove a directory, you should use rmdir, and not rm? There is
> also "rm -d <directory>", but that is limited to root, and should be
> used with care.

You were right. Had an iso mounted to that dir, duh!!!!

All is good now. 

Thanks everyone.
James