Check out this thread:

http://www.thetradersden.org/forums/...d.php?p=686729

Lots of people have problems uploading after completing with Comcast because Comcast uses a company called Sandvine to prevent them from uploading after they complete. If you install the free firewall and follow the instructions you should be able to upload just fine.
http://redhatcat.blogspot.com/2007/0...ith-wipfw.html

You only have to forward one port for Azureus.