What format are they ..mp3 you say.

Have you tired them in another player.

Try QCD, it's free.

www.quinnware.com/

Also.. try associating the files with your player. In Windows Explorer, there is an option to 'Open With' then you can associate the file with any application that you want

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~Kath~
Always judge a person by the way they treat someone who can be of no possible use to them