OH MY GOD!!!!!! I had the same problem with the same distro and the same sound card! LOLOL...
Dont use soundserver and it seems to work... I just dontu se the sound server but MDK doesnt seem to mix the sound rite cuz Im like playing a song and I dont hear if I get an IM, and if my sound card isnt being used I am able to hear the IM...
good luck and if u find out about the mixing prob just like email me@
elmetal@bellsouth.net