I see thank you Guy`s for the reply.!!

But i cannot see the demo servers i joined before.There are 2-3 of them.

With patch Y18 you cannot see DEMO host`s why not?
I read that as S2 user you can see and join DEMO,S1 and S2 hosts.
Even there is no button in multiplayer menu to switch to demo user.
Can some one tell me why?