ISP = UNIVERSITY (I won't name which one)

It's my bet they are blocking ports or p2p sharing. Many if not most universities do nowadays because they pay a lot of money for their bandwidth & p2p uses lots of bandwidth. Try setting FW to use a port between 49152 - 65535. An example is port 64049. Go to FW's Tools -> Options -> Advanced -> Firewall, and set both connection & listening ports to a port in that range. Then go to File menu choose Disconnect. Wait a minute. Then File menu -> Connect. Else restart FW.

If that does not work, chances are the university has special tools to block ports for p2p programs which can detect when they are being used & attempting to use the bandwidth.