iTunes Library Consolidation

Trying to consolidate files on iTunes (want to remove duplicates) and get the following error;

"Copying Files failed, because you don't have

permission to change your iTunes Media Folder or a

folder within it."

Quite specific.

I am the admininstrator on my machhine, and the only user.

Any thoughts on what might be happening, if not a permission issue, or how I can find the folder quickly that has the permission issue, as iTunes creates 100's of folders.

Thank you.

ekc