Not sure if this is a problem with SuSE or a feature, it could also be the sound card. Wether I use redhat, mandrake, suse, slackware, debian, knoppix..
All of which I've tried and used for a while.
My sound card is limit to 1 channel of operation, while in windows it'll play .. a ton of sounds at the same time as I've found..
Tried everything I could think of and never got it to allow more than one sound at a time.
**Update**
Found after a couple of searches that this has been discussed before and you should have checked the old posts before asking
It seems alsa is causing the single sound at a time settings, and switching to oss makes multiple sounds possible.
Since suse is based on the alsa drivers...
Oh well. I can't switch to oss cause my sound wont work at all then, but you could give it a try?