Sorry there Mr. Tricorder, with the other posts I mixed up the connection types.
Here goes...
You are on a college network, right? Probably T1 speed...
I'd check with your college's computer administration, and find out if there's a firewall protecting the dorm. It may be possible that you're all set to play, and are being blocked by the school. We've had at least 2 or 3 people that had that problem before.
If the school does have a firewall, see if they'll open a few ports for you. Find one of the numerous "how to connect through a router" threads, and inside it you'll find a list of port numbers. Don't worry what they mean, just get all those port numbers (or the thread's URL) to them, they should know what to do...
Let us know once you find out about the school's setup...