How can fix this ? Thanks.

Forward your ports through your router home page. Quite easy task depending on your ISP cause some do block P2P networking. Your best Googling port opening for your ISP or router.

this would help
http://portforward.com/english/route...outerindex.htm

You can also enable upnp on your router. I think it auto forward the port you need

Check on this site to see if your ports are forwarded correctly:- http://canyouseeme.org/ Its a handy site are very accurate!

After you have made changes to your router and torrent client, you need to have an active torrent, in order for the TT tracker to recognize it. This way you can check if your adjustments work. Simply download any of the freeleech packs.

As new user on TT, you must wait for 48 hours first, for the site to update your details.