can't find friends files
 

A friend of mine has limewire and we thought it would be easy to share a small video (50meg) over limewire. They are sharing it, they can search and download other files. when both of us search for the file it won't come up. how can I hook up to that persons computer for that file. I just can't find the file when I search. the name is right, and unique. any ideas?