problem with the sound card

I am using opensuse 11.2 on my sony vaio PCG-3F1M. I am a regular user of skype to talk to friends and family. I was usingwindows vista before this and everything was working fine. But since I installed opensuse11.2 I am facing a big lag in sound which is quite annoying. Lag is for like 3-4 seconds. I dont know how to solve this. So I’ll be really thankful if anyone can help me in this.