Sounds like a driver/install issue of your sound card. From your description, not even the Windows mixer is seeing your sound card -- which means RR will NOT see it either. You should re-install the original sound card drivers and verify your card works in windows (and RR works with it) -- this will prevent you from wasting time with a bad/damaged sound card. Once you've verified the sound card works as it was originally designed, THEN you can play with drivers and windows settings (for whatever reason you may want to do so). You can be sure however, that if the sound card isn't installed as a standard windows audio device (and has a standard windows mixer interface) that it will not work with RR's mixer. Still a plugin could possibly be made to control the volume of your device (if there's a way to do that).