Sound & Graphics Issue with 2004

Greetings,Recently when flying any aircraft or from any airport, the sound quits on me and the framerates go down to 0 or 1 for a period of time. The sound never returns but I am able to fly around and switch aircraft and airports. It tends to happen when switching views and it happens within the first 5-10 minutes of being in the sim.Interesting to note that it effects my entire system's sound. I no longer have ANY sound in Windows. Restarting the Sim doesn't fix it. I actually have to reboot entirely to get sound back.I upgraded to DX 9.0b and ran tests. Prior to locking up the sound the tests work fine. When the sound is locked up and I run the test after exiting the Sim it fails on the sound portion.I am currently running 6/03 Catalyst Drivers 6.14.10.6368 for my ATI Radeon 9700 Pro 128.Thanks to all for your assistance!