I am using Windows. After I enter my server info, BFGMiner doesnt say anything. Just acts as if it's connecting and then closes. I am using an Antminer and a twin fury. Both are picked up by windows when I plug/unplug them.
Okay that is definetly strange stuff. Could you please start BFGMiner from the command line and append the following parameters:
--debug --debuglog --verbose --logfile fail.log --device-protocol-dump --log 1
Afterward find "fail.log" in the BFGMiner folder and post it's content here.
Those enable parameters debug mode and loggin to a file and make BFGMiner as verbose as possible so it maybe tells us what is wrong.
It is really hard to tell you why BFGMiner has stopped working for you without more info.