HELP!! I cannot import MP3 files into Garageband!

Hi everyone this is my 1st post here and i hope you can help me.

I use my MacBook Pro mostly for making music, and today i tried to import an MP3 to Garageband and the regular dialogue of "Importing File" appeared as always, but then... NOTHING! The file isn't there! Then i tried importing the file directly from iTunes and i couldn't DD: what should i do i want to suicideee~~~

Could be that the file is copy protected. Where did you get the mp3 from?

Adric said:

Could be that the file is copy protected. Where did you get the mp3 from?

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No is not that because i've used that same MP3 before in Garageband, plus, it says that it is importing the file but at the end nothing appears, and i've tried with other different mp3's too and it doesn't work