Some of my computers that I have set up for FAH connect to the server but then never receive work units. I've seen one get up to step 50 in trying to get work, but nothing.
I've also got one that can't seem to send it out, I'll probably have to take that wu and send it off with a another comp, but seriously here! (It's 20,000 step Gromac, so I'd like to get the points. )