Did you read the link to the thread I gave you? This does offer more than one solution to the the document & playing issue. QT has limitations! It can't play 'all' mp3 formats out there. There's different types of mp3 that require different codecs to play. You'll need an mp3 player/audio app that has a broad range of mp3 format codecs.

Does the file actually have an extension .doc? That is strange! Did it have .doc in its name when you searched & started dwnlding it? What I might suggest is to use your filters. Go to LW's menu Tools-Options-Filters & keywords. Add the word .doc, press apply & ok. See if this makes a difference to your search results. Have you rebuilt your desktop lately? Next time you restart your computer, simultaneously hold down the Command+Option keys whilst it's restarting. It'll eventually ask you if you wish to rebuild your desktop file, press yes. The desktop file can become corrupted. Never harms to do this on say a monthly basis - (in fact it's good.) Try the above & see if these things help, if still have probs, get back.