Adobe Digital Editions won't connect to fulfillmnet center

I can't get ADE to connect to the fulfillment center to download the ACSM files. It just gives the error message about not connecting to the server and to check my internet.

I've tried uninstalling ADE and installing both 2.0 and 3.0. Deauthorizing and reauthorizing my computer. Nothing's changed about my firewall when it worked four days ago. This software is so damn frustrating.