Non-Admin users can't change DFS server

Hi,

When I logon to our Windows Server 2008 R2 AD domain via a XP workstation with my domain and workstation admin rights, I can manually change the target DFS server on my mapped drives.  When I logon to the same workstation as just a domain user and try to change the target DFS server I get a "DFS Shell Extension" pop-up saying, "The parameter is incorrect."

Shouldn't a domain user be able to make this change?  Any suggestions on troubleshooting this?

Thanks,
Ben