Ah, if it's saying it's having problems connecting then it may indeed be doing something wrong :\
Hmm, the only tip I can think of is to make sure you're not leaving a space at the end of the announce url because that can sometimes cause problems (although most everything should handle that bug nowadays). Oh, and if you have the option when creating a torrent, choose "classic style".
Beyond that I can't think of what would be going wrong.