grp44

I am running a computer lab, and there is going to be a class on virtual worlds that will use 2nd life. Every time I try to connect with a lab computer i get a "region handshake failure" and get disconnected. I tried logging into 2nd life with the same account on our campus wireless network and i connect everytime, but in the lab it fails. I also tried to get the correct certificate by logging into secondlife.com in IE with the Antivirus disabled but it still fails. Can you help please?