ALSA configuration problems

Hi, I have Etch on AMD Sempron 3000. i have no problems playing audio CDs or DVDs.  But if I try stream video there is no sound at all.  Mlayer stated the following error: alsa-lib: 'pcm_hw.c:1248:(snd_pcm_hw_open) open /dev/snd/pcmC0D0p failed: Device or resource busy' I fact the device pcmC0D0

ppp

Hi all, What coul be the reason of pppd failing after establishing a connection with remote computer? Regards   Everyone is raving about the all-new Yahoo! Mail beta.