Hurrr, try DLing the files you need for seeding anonymously (log out from the tracker)
Then DL the torrent file again. and SEED
EDIT:
erhem, in a nicer way:
Log out from the tracker, and DL the files you need anonymously.
Then log on, and DL the torrent files again and open them in your bittorrent client.
Then just Press ''yes'' in the window that appears.