[SOLVED] Tracker gave an error: "unregistered torrent"

[brainvision]

Hi everybody there..

I'm using Transmission 1.75 (9117) on my slackware 13 (package created by me with slackbuild and source code).
I've always used Transmission since I've passed to Linux.. but this evening I noticed this problem: I was downloading ca. 10 torrents.. I went to eat for dinner and when I came back all the torrents info were red and there was this message for each of them!
Tracker gave an error: "unregistered torrent"
What is this? I've tried to delete all torrents and download them again.. but the error message appears again! But now it seems that it is downloading without problem.. but the message is still there..

What could I do?

Thank you very much for paying attention..!!

[brainvision]

Ok men, I've seen that nobody could give me an help.. but I understand it because it was a problem of the site from where I was downloading those torrents.. In fact, downloading other torrents from other sites didn't gave errors, while others still did!

So, problem is not a Transmission problem. I'm adding SOLVED to this post..
Thank you anyway and forgive if I had too much hurry!