2. I've got no idea...
1. This is the normal message when a user doesn't have permissions to access the soundcard. There are a multitude of options on setting up permissions for access, and I prefer the one that seems most secure to me.
create a group called sound (as root):
Add your user to that group:
usermod -G sound (I believe, see man usermod for more info)
And then own the device to that group:
chown /dev/dsp /dev/mixer /dev/audio root.sound
And make sure group sound has permissions to use the device (I believe w and x are what they need, this is all from memory, my appologies if you have to tinker a bit
chmod 730 /dev/dsp /dev/mixer /dev/audio
And test. See if it works now.
If not, you may have to tinker with the permissions a bit, it might be w and x, or if you aren't too concerned you could always: