and since I want to UPLOAD to recover my ratio, it's best to have all the file. A small point: you don't need all the files to UPLOAD. Your torrent client will pass on what stuff you have got. However if you don't download all the files it will forever show as downloading on this site and you can't vote in the category. And you would need all the files if you ever wanted to reseed the torrent.

I've found the option to activate UPNP, and I already had the firewall exception done. Let's hope that the UPNP thingy helps. Thanks for the tip