utorrent.
Like Deerpark said, this probably isn't a problem with utorrent. It's probably a firewall or network setting.
...
Yep.
Has he examined his hardware and told us the brand name / model number / anything about his wireless? ... maybe I overlooked it.
I did see where he said it is not a router, but I wonder.... I know one person that
insists that the Westell 6100 DSL modem is not a router, because it has only one ethernet out connection. When I flipped it over and showed that "router" was printed on it, even that didn't help.
With that experience, anything is possible.
So - I'm wondering if he really does have a router and hardware firewall.
With more info on his stuff, he could then go to :
http://www.portforward.com to see if it is listed there, for instructions.