BACKGROUNDCOLOR for annotation labels?

[Abe Gillespie]

I use an annotation layer to add labels at runtime.  It works mostly,
accept I can't get BACKGROUNDCOLOR to work.  Am I missing something?
Following is the layer.

[snip]
   LAYER
   NAME "annotation"
   STATUS ON
   TRANSFORM false
   TYPE ANNOTATION
   POSTLABELCACHE true
   CLASS
    LABEL
     TYPE TRUETYPE
     FONT arial
     SIZE 10
     POSITION cr
     COLOR 0 0 0
     BACKGROUNDCOLOR 255 255 255
    END
   END
  END

Thanks.
-Abe