cant change date n time
 

hello to all
few days back i joined one of my computer to domain and again after some time i changed it to member of a workgroup, since then i m not being able to change the date and time. whenever i tried to do so i get a msg "You donot have administrative privileges to change date and time even when i logged on with administrative rights. could someone tell me whats the problem and what is the solution for this?

Thank you.

Did you try restarting the computer then logging in as admin and see if that would work?

several times.... i tried almost every possible way.... its been few weeks i m trying