Live broadcast stops after 3 minutes

[brucerippin]

Hi,

I was wondering if anyone has experienced what I'm currently experiencing. Once I launch a live broadcast everything goes well, then even though I don't receive any message the live broadcast just stops. It happens everytime without fail. When it first started happening it was always at exactly 3:26 (3 minute 26 seconds). Now it happns just after the 3 minute mark. This is with my desktop PC
When I do a live broadcast with my laptop, I don't experience any problems (unfortunately my laptop is not up to the task (not enough power).
I will list my PC specs:

Win7 Ultimate
i7 975 EE @ 4.2GHz
12 GB Corsair Dominator DDR3 1600 MHz
(2) ATI 5870 1GB VRAM (Crossfire Mode)
128 GB SSD (OS)
600 GB Velociraptor

Internet Connection - Fiber Optic 50Mb down and 30Mb up
SB Titanium Xfi audio card

Thanks in advance for any help I can get!