You have downloaded the small .torrent file (the "torrent") and added it to µTorrent. Now your µTorrent tries to download the movie file, because it does not find it on your computer or external storage drive.
When you add a torrent to µTorrent, there should be a window displaying the files of the torrent's file list and allowing to set the download folder. There you need to press the ". . ." button and change the download directory to the folder which contains the movie file.
If this window is not displayed, you have changed µTorrent's default UI Settings.
If you clicked to fast over that window, try the following steps:
1. Stop the torrent (do NOT remove)
2. Click with the right mouse button on the torrent in µTorrent/BitTorrent's list and select "Advanced" > "Set Download Location…" > navigate to the to the folder which contains the file, respectively folder, from which the torrent has been created, confirm with "Select folder".
3. Right mouse button click on the torrent in µTorrent's list and select "Force re-check". The torrent should check to 100% and µTorrent displaying "Finished" instead of "Stopped" in the status column.
4. Restart the torrent, it shall go to "Seeding" or at least to "Queued seeding"