Have you allowed uTorrent through 7's firewall? Try turning on the following options under the Connections tab in your settings in uTorrent.
And if those are on, or you turn them on and it still doesn't work, try running the speed test shortcut (either from the menu, or press ctrl-g) and click the port testing button. That should open a window in your browser and let you know if traffic is able to go through whatever port you have chosen.