keep being unlinked in mumble

[Gore]

didn't have this problem in xp. whenever i join a mumble team, doesn't matter if i start mumble before or after joining a game or restarting mumble i keep hearing people all the time. it sometimes sorts itself, but only sometimes and that just isn't enjoyable and it's very distracting. it's normal when the round ends/starts but this is also going on when spawned. its win 7 64 bit. oh and btw whenever i try to save my settings it stops working and crashes.
how can i fix this? cheers.