This is not a problem with your computer, but a problem with the Internet itself - so don't worry about it too much. You can try adjusting your player to increase the buffer time settings , but if the delay is bad enough this may not be enough. You might also see a similar effect if you download a lot of other web pages, large e-mails, or other files to your computer at the same time you play our broadcast, or if the connection you have to your Internet Provider is slower than normal. In this case, the traffic jam exists on your phone line, or your computer may just be working too hard. The audio quality will usually improve when your downloads are finished or if you close some applications, or if your connection is slow, try re-connecting to your provider.
Broadcast Help page for more information.
If that doesn't help, you may wish to contact a technical support provider or your computer manufacturer for guidance.