Pidgin, Gmail/Google Talk

[John Wall]

Hello,
I am trying to get my Pidgin 2.7.11 to work with my Gmail/Google Talk 
account on a Windows 7 computer. It was working previously on my 
computer, but all the sudden it stopped working. I keep getting a 
message saying  "Unable to connect". I've checked my username and 
password several times, but it still does not work. Does anyone have any 
suggestions?
-John