What computer operating system is your Premiere Elements 13 installed on?
Are you working with iTunes music in the Premiere Elements 13 Editor? If so, please convert the music to wav version in iTunes, and then import the wav version into the Premiere Elements project (Add Media/Files and Folders.....).
What is your prior experience with ".mp3 music" in an earlier version of Premiere Elements? In the matter of iTunes music and Premiere Elements, I see no changes.
Please supply more details.
Hi! I am using Windows 8.1. I bought the music through Itunes. I am pretty sure that I have been able to use MP3 format before with Elements 11. I will try to do what you are suggesting.