You might be seeing fake files. After you click to download, do the files sit connecting for ages, then need more sources, before they eventually get stuck awaiting sources? Are there lots of sources for the files?
Fake files showing up in search results

Search again, vary your search terms a little & try the All Types search. Check the file with Bitzi before download. I'm not sure whether many documents are going to be rated on Bitzi (it's mostly video that's rated) but it's worth a try
How to use Bitzi

Otherwise, check in LW's options & make sure that your mazimum downloads aren't set at zero.