Machan Check This thing I had da Same Prob
As i Know Dialog is Using Some Traffic Shaping Things in Thier Servers .So They Reduce P2P Bandwidth ,When Protocol Encryption us Turned on Thier Traffic Shaping Programs Can't Track The Data Packets..
You Can Turn ON Protocol Encryption On In Torrent Client .I Tested This on uTorrent and Works Perfectly to me
1.Go To Options in Your Torrent Client ( Ex: uTorrent )
Go to Options Menu ----> Select Preferences
2. Go to Bit Torrent TAB
In Bit Torrent tab You Can see a Option Called Protocol Encryption
Normally that option marked as Disabled ---> .Make it as Forced
3.Restart your Torrent Client