[Chojin]

You should still make sure that your TCP and UDP ports for the torrent program are open, because it'll greatly improve the speed at which you download and also open you up to more potential seeders. I don't know where it is in uTorrent, but there should be a 'test' button in the options somewhere to see if it can access the internet as well as it should.

Also, make sure your upload speeds are consistent with your connection. Torrents work on a ratio of UL/DL, so having a correct and high upload speed will speed up your torrents as well.