Digital BW, The Print

I'm hoping someone may be able to help me.
I've recently purchased an Epson 9800, and am having a problem. I 
purchased the printer primarily for doing fine art, black and white 
prints. I've previously experienced problems with color casts using 
Epson color printers(2200), and converted with partial success to the 
Peizography system a couple of years back on my 1280. I was therefore 
happy to see that this new printer allowed black and white prints 
using the black cartridge, the grey cartridge and now the new lighter 
grey only. No color inks, no casts!

Unfortunately the "advanced black and white photo" option remains 
grayed out with any of the matte paper types selected in the media 
type window. It only seems to be available for glossy type papers.
I am using the matte black ink cartridge, the epson 9800 driver and 
the status monitor that has picked up that I have installed the matte 
black ink. The status monitor has updated the media list to only 
include only matte papers and still the Adv. B&W option is not 
available. I downloaded the Epson driver software to the R2400 and it 
behaves in the same way  graying out the adv B&W option the moment I 
select a matte based paper. Is this a recognized issue that you may 
have heard of? Or simply a configuration problem?
I really appreciate you taking the time to read through my query.
I'd value any input you may have.
Regards
Mark van Coller