I'm losing sound

[NYplayer]

I have plenty of memory (2gb) and just recently i've started to lose sound while playing. it seems to happen when i have a lot going. 8 tables + playeview. The two times it happened today the sound cut when when i clicked the "take me to table" button when a seat i was on a waiting list for became available. i had 4 other talbes open at the time but playerview wasn't running. all sound seems to be gone until i reboot my computer. any ideas what's causing this or how to fix it?