Is your LW connected?

How many green/blue connection bars?

If LW's connected - what happens when you try to download a file (eg does the file not even move into the download pane, do you see an error saying LW can't find a license, do files sit connecting & then need more sources, do you see an error saying that you've already downloaded the file etc etc)?
Please help us to help you, by telling us what's going on.

Coffee house might have some firewall included in their setup.