Maybe provide a screenshot & which version of windows - but this smells like an Internet Security software that's blocking uTorrent from accessing a TCP socket. Can you use it for torrents on sites other than etree.org?
The problem is only with etree, DIME, TTD, YEESH, HC, all fine. I just figured it out that the culprit was peerblocker. After disabling it etree is fine. Now I got to figure on how to configure etree into peerblocker so I don't have to disable it. But right now thats a miniscule issue. At least now I know what the problem is.