mixer, RH 8

[Ted Parks <th parks verizon net>]

When I try to adjust the volume on my PC running RedHat 8.0, I get the 
following message, despite the fact the soundcore module is loaded and 
the CD player works:

"I was not able to open your audio device.
Please check that you have permission to open  /dev/mixer and make sure 
you have sound support compled into your kernel."

As I said, I can play audio CDs, but the machine won't let me change 
volume  on the audio output. What do I don to get full audio 
capabilities on the machine using Linux.

Thanks,
Ted Parks