By the way your query was the same as mine. Which ISP are you using?
About your query most ISPs have blocked the incoming ports to limit the downloads

and for security reasons. You could try the following;
1) If you have a firewall enabled, try disabling it and then running the torrent
2) Try finding open ports that could be used for incoming connection.
3) I am trying to find softwares available to find open incoming ports. Otherwise you can use Azureus NAT/firewall test to manually

find incoming ports. After I lot of Hard work I could find 5-6 open ports for my ISP.
4) Lastly you can call the ISPs customer service and ask them which ports have been kept open or ask them to forward some ports.
Bye..