please help..

[tralala]

i can't add a new torrent. everytime i click add new torrent or double click the .torrent file, utorrent closes. do you have any idea what's happening? thanks..

edit: okay to make it more specific, i'm using windows xp and i've used utorrent for many years. this is the first time i encountered such problem. i made a guest user account last night and i clicked the "add torrent" and it turned out ok - utorrent did not close and a new window asking what torrent to download opened. but when i switch back to my user account, the same problem happens. i've reinstalled many times but i still can't download.