GP to map drives works except for one

The customer has a relatively new SBS2011 server.  I am using GP to map a total of 12 drives depending on the user.  I added one today but it is not taking.  I limited it to 2 users.  Confirmed their permissions but no.  With this one I shared a users desktop folder in Redirected Folders.  I tried testing it with net use n:\\server\desktop but that did not work.  Net use n:\\server\Data\Users\FolderRedirections\hrspecial\Desktop did work.  However using that UNC string in the GP still does not work.

What am I missing?

Thanks, John