hi i am useing wifi fo internet with proxy server but i cant download through this cannection
That is weird. I can at home and at work. Maybe your firewall is keeping you from up/downloading anything. It also might be the torrent player.
You may have to forward the ports on your router to be able to run your bittorrent application. What program are you using?
You gave very little info to go on. What kinda laptop and what FW or AV are you using? How are you setup on the proxy server??? What are you downloading? More info would help here....?