Disapperating downloaded torrents list

[dadel]

Hello,
first of all I apologize 'cause I don't know if this thread goes here but I need you help.

I have a problem with UTorrent, I can download perfectly files and they are saved in my computer. However, when I turn off the computer and then turn it on my list of completed torrents disappears. I mean the files (videos) are in my computer and I can play them but UTorrent list is empty. Because of that, I'm not seeding and therefore I'm not receiving bonus points.

Has happened something similar to somebody? How can I fix it?

Thanks in advance,