mp3 player says "no authority" when trying to play

It is the player your using I would bet. If you have a media player that connects to the internet to verify the audio file.
downloading streamed files from napster may carry DRM now, like other tools such as iTunes WMP all require a regestered certificate to identify you if you don't have one then it won't play.
Often times these files will only play on the designated player for Napster as is the case here.
Did it ask you for a certificate?

what media player are you using?

yes that is the cause, i was just reading about it tonight. media player 10 for windows vista. how would i go online and validate them? so i can play them on external devices...thanks!

yeah i know i have researched it a little bit. ive tried pushing yes but its greyed out. i guys thats a good restriction. thanks for helping. you can delete this question

Do it yourself jsthursday
A "Delete Question" link is in the body of your question (the actual first post that is displayed).
Just clicking on that link will send an auto response with all of the information the moderators need to properly handle your request
There is a 'reason' block for you to complete and you can just insert
"Self-answered" or "No Solution" (or any other reason you like) and we will start the process.

All the Best Merete

Just one question
 why not accept my answer  and that there is no solution beacuse they are copyrighted..  I assisted you to understand what the problem was and now you say thanks delete it.

okay sure.

Thank you, now others will see this question and the solution that fits the problem.
you can record audio  from (speakers) and export to mp3/
Just search the tools out
All the best with it.