Sound fix plz?

When I try to play 1.6.4 it says in the launcher:
Client> 2013-12-01 15:37:51 [CLIENT] [SEVERE] Realms: Invalid session id
It doesnt do that for other versions (tested 1.5.2) and if i play 1.5.2 i get sounds, but none for 1.6.4. plz fix this
edit: does it for 1.6.2 too