Go to LW's menu View>Show/Hide & select Connections. That will get that window back!

You could be right about the school blocking. Using your browser go here: http://www3.limewire.com:6346/ The page should say ‘Test Page was a Success’. What happens when you go there? (Sometimes they block certain ports.)

See this post by Deepblue HERE (click on link)

A suggestion, go to LW's menu Tools>Options>Firewalls & select Force IP & type in port no. Press Apply. (Force IP instructions & sample image & 2 posts after that.) Then try to connect manually from the menu bar selecting File>Connect

If that doesn't work, try other port no.'s both for 1. Force IP & 2. for the listening port. Try ports like port 6344 or 6348. If that doesn't work then try others like: et voilà's post here Else look at the 1st post on that thread link for Force IP by Ursula & you'll find a link to other legal ports you can try.

If this doesn't work then try a Proxy: Another option is A Fix for those whose ISP's block Limewire which is using proxies.