I can't provide the specific torrent link because it's a private torrent site and the torrent won't work without my key. But interesting about certain clients not working. Poking around on uTorrent I clicked the "tracker" tab and I now see it actually says "Failure: access denied, banned client"!
I didn't even know this happens? That must be it.
Why are some clients banned? What's wrong with uTorrent?