It may be that your ISP is blocking your torrent client. I know for a fact that Comcast does that, and even somewhat Cox and Verizon. Verizon works so so with uTorrent and Azureus, while Cox works best on Azureus.
Other than that, I have no idea whats going on.
But I'll look into it more....
I just noticed that you live in London, and I'm pretty sure that the ISPs there are cool with torrents for the most part, but i may be wrong.
I take it that you've doubled checked that you set up the torrent correctly? (hash check, DHT disabled, etc.)