Web Server Problem

I loaded RabitWeb sample onto BL200, but cannot access this server from at least half of PC’s from office intranet. There are few different versions of IE installed and some works and other don’t. When we installed FireFox on one PC where IE couldn’t access web server we have got access??? I do not think problem is in RabitWeb itself, but somehow IE settings prevent IE of accessing rabit web server. I have setup with static IP address defined for BL2000 web server.

Anyone have any ideas how to solve this problem???

Could it be that firewall settings on the clients that fail to access the Rabbit are blocking access to the web server on the Rabbit?