Room glitch.

When I want to enter in some room it gives me : 29015 or some thing like that.I tried to enter a room 10 times and nothing.I restarted the game cause I couldn't enter all rooms.Lol 1 room worked - my own.I played 1 round and then , it shows me in the middle of my play screen : 29015 then , disconnected from server.
Can some1 tell me what to do?And what's with the 29015?