Sounds, and Crashes.

:-eek Hi Everyone,Firstly, my sound sometimes goes a bit ga ga on me when using squalk box, I only seem to get this issue when running SB, what happeses is this, in the cockpit of the PSS 777/747 I seem to get a double click instead of a single click when i throw a switch, and the sound in general sometimes seems to sound kind of like underwater if you know what I mean, and also my sim has crashed once or twice when running SB as well, these things don't seem to happen when i'm not running SB, the sound thing also takes my frame rates right back to4.6 or 5.1, wow, this is bad, I am up to date with my Vid, Sound, XP drivers etc, I am on the current FSUIPC and all are calibrated too,and I am running DX9, on a Win XP Pro sys with a GF4 Ti4600, and over a Gig of RAM on a XP2000 CPU, anyones help or ideas here would be most welcome as this is a strange issue indeed and just wondered if anyone else has had/heard of these problems. I love the whole VATSIM thing and think it's marvelous that these guy's do this for free, but understandably this is putting me off.thank you anyway.Steve.W.