Digital BW, The Print

I am having an issue with the ABW option.  I have a R2400 but I am not
able to access the ABW settings when I have slected any paper type
besides Premium Luster, Semi-gloss or Gloss.  The option is "grayed"
out and unavailable when any matte, VFA or ultra smooth paper type is
slected.  I have made sure that either "best photo" or "RPM" is also
slected.  Any ideas or comments would be appreciated.

trekrider