- UDP Traffic needs to be allowed in firewalls for DHT to function.
- PeerGuardian needs a smarter blocklist selected. Several of the blocklists generated by Bluetack block the DHT bootstrap nodes used by uTorrent.
- IF DHT has worked in the past, try torrents from OpenOffice or Depthstrike Entertainment's Open Source and Freeware tracker
- Shut down uTorrent, remove the dht.dat and dht.dat.old files from %appdata%\utorrent and restart uT, then retry.
If you're going to post on the uTorrent forums for further help, post useful information, like a list of the internet security software you have installed, HOW it's not working, and what you've done to troubleshoot.
I don't handle troubleshooting of uT issues here.