I'm having the same issue right now....

I've got full green bars...but when I search for something nothing ever shows up. I tried your first suggestion....but just to be clear those IPs go in allowed correct?
I've tried most everything but am at a lose. I also couldn't find the preferences folder that you were eluding to.

Everything worked fine a couple days ago. I recently switched ISPs, its Charter, but my buddy has the same setup as me and his works fine, not to mention i'm allowed to connect just fine...just nothing coming up on search...