They're probably fake files. For a speed test try d/loading a file from here:
http://www.magnetmix.com/audio2.shtml Click the d/load link. They're magnet links so they'll open in LW. It may take a few minutes for the file to start d/loading. See what kind of speeds you get. They should d/load at a pretty decent speed. If they don't then it's probably your isp slowing your connection speeds.
What kind of speeds have you been getting with LW, and what should they be?
BTW: We don't mention file names if the files are copyrighted
.