How do I get the music I want into the game?

I like this music

http://opengameart.org/content/magical-forest

But Construct doesn't seem to like it. It wont convert it, says its not in the right format.

What can I do?

I was thinking of trying to use audacity to change to a different format - is this the correct address for audacity downloading? I'm quite paranoid after another laptop got a home page changing virus on it for another application I once downloaded : http://www.audacityteam.org/download/windows/

So you're asking is that the correct link for downloading audacity? Looks like it.