Azureus stops Iexplorer working!

Since I installed azureus, after a certain period of time (few minutes to a couple of hours) Internet explorer stops working, even though azureus continues to down/upload info.
Has azureus caused a problem with NAT? I have 2 pcs running wireless of a linksys wireless router with 512k ISP. Both PC's IExplorer stops working.
I cannot access the web based setup for the modem either.
I have ZA5, which makes no difference turned off, winXP SP2...PC hardware high spec so no probs there.
Someone please help as this is getting very annoying!

 

Your torrents could be eating up your bandwidth.. I have 3mbps cable and if I have a lot of torrents (especially fast ones) my browser load times slow to a crawl, relatively speaking.

 

Hi, I've limited the bandwidth and it's great, for a while.......I have also forwarded ports 6881 to 6999. HTTP runs from port 80. It's fine for the 2 to be running together for a while, but then IExplorer just stops working completely, on both pcs!
i can't work it out and I wanted some advice from someone to help fix the problem.