My download is sux....but my upload, well...this one works!

Everybody is taking 10/12 kbps from me and i catch 2/3, even puting for the ktorrent makes the automatic settings...

How i fix it???

It all depends on the configuring properly and the torrent.
Here is how one should configure an bittorrenc client:
http://torrentfreak.com/utorrent-develo ... ps-080805/