It's been a massive pain in the *** trying to download wotlk for me. Tried multiple links from many sites but none of them seem to work.
I finally got the warmane torrent to work, left it downloading overnight (live in thailand so internet is sh*t), and this morning I found it stuck at 76.8% saying 'connecting to peers..'.
Tried turning firewall off etc but nothing worked, strange since it worked fine for the first 3 quarters of the download.
In some cases, which might be yours, an exception to router is also required.
Create an exception there according to the ports indicated on your P2P client settings.