Digital BW, The Print

I'm trying to produce a b&W print on Kodak Professional inkjet paper 
(lustre finish). I've downloaded and installed the Kodak supplied ICC 
profiles for my printer, and the image was converted to b&w using the 
channel mixer method. I'm using the stock Ultrachrome inks (although 
I just realised I didn't check if I've got photo black or matte ink 
installed right now).

When I print to Epson Enhanced Matte paper (with the Epson profile), 
I get a reasonably neutral-toned image. When I use the Kodak paper 
(with the Kodak profile) I get a very warm image, tending to the pink 
end of things.

Does anyone have any experience with this setup and can offer some 
tips?

Thanks

Colin