Composer column

Since my Zune 80 software does not allow me to enter the name of the Coposer who wrote the music I am playing, I tried to use MP3tag for that. Mp3tag does allow me to read or edit the composer's name, but when I include the Coposer column in the view, it is empty, even when individual entries do have the correct Composer information-- it is invisible in the grand matrix that shows all the data.
What am I doing wrong?

Make sure that the string entered for field and value is %composer%