When I had Concast I had the same problem with not being able to upload after completing. I upgraded to Bittornado 3.18, which has encryption, and had no problems after that. Also use a port between 50,000 and 60,000. See this thread for more info on Concast and Sandvine (the software they use to throttle BT):

http://www.thetradersden.org/forums/...ad.php?t=43773