Go to your Library window, click on each of your shared folders, look to the columns to the right side. If they have numbers under Upload columns then that means attempts have been made. If Hits columns show numbers, then that means people have found your files in their searches.

If you see a brick wall icon at bottom left of LW's interface, then that might be one reason.



* Some good tips on sharing files here: How to Share Folders (click on link)