Downloaded files don't all show in the Library window
 

There's probably a simple reason for this (I hope). I've downloaded about 2 dozen mp3 files so far (those that are compete anyway), they're all in the proper folder as far as the Finder is concerned, yet only 6 of them appear in the Library window in LimeWire. Can anyone tell me what's going on? I'm using OS 8.6 on an old Power Mac.

One other problem; I've downloaded a couple of mpeg files, but can't open them. I've never had problems with any mpegs before - QuickTime has always handled anything I've downloaded previously, even stuff from friends on the dark side (PC owners).