Hi,

I had exactly the same problem until I realised what was going on.

Amongst other things, files on our Mac's must contain two important pieces of information to enable the finder to open them with the correct application, these are the file type and creator type. When you download over the internet you don't know if the machine that the file is coming from is another mac or a pc. So it's just luck if you get the correct file and creator types, that's why some downloads play and others don't.

One solution to the problem is to download and use the AppleScript "YA MP3 File Converter (1.2.1)" to correct the file and creator types. Download at:-

http://nordcom.mac.tucows.com/preview/206604.html

This is my local mirror site of http://www.tucows.com

After downloading and expanding on you desktop, double click to run the script and choose which mp3 player to set the files for. Now you're ready to start converting, make sure that your filenames provisionally end in .mp3 and then drag them onto the script. After conversion they re-appear at their orignal location with the correct mp3 player icon ready for use. Now you can rename them if you wish to get rid of that stupid Windows ending.

Hope this helps,

Tony.