Ax Edge will not play Song from Flashdrive

[rockit31]

I have updated my firmware to version 1.1 and now am trying to play an mp3 song on the Ax Edge via a flashdrive.

The song is located in the Song List directory and when I hit the List button it displays the name of the song, but when I hit Play the display says

Incorrect File!

I have tried this with a WAV file as well with same results and have tried all of this with another flashdrive as well. No good.

What am I doing wrong?