Please HELP!!!

[mt13]

I have been trying to watch the We Are One concert at:
http://www.hbo.com/weareone/webcast/index.html
for days. The problem: the audio breaks up. It is the most annoying thing imaginable. It sounds like the audio skips every other frame like you are listening to someone across the platform as a train goes by, catching their words between the cars. I upgraded to QuickTime Pro and updated all software thinking this would solve my problem but no, the sound is the same.

I am connected via DSL through Airport. I am on a 24" iMac 2.8 Ghz Intel Core 2 Duo with 4 GB SDRAM.

Any advice would be greatly appreciated.

thanks!