Digital BW, The Print

I'm using an Epson 1280 (grey) along with MIS UTK inks in cartridges.
I've tried Epson matte, Hahnemuhle Photo Rag and Museo papers. I've
used the Roark curves with the Epson driver and QTR. I manage to get a
slight magenta cast no matter which commbination of inks and papers I
use.

My computer is a PC running on Windows 2000.

I'd appreciate suggestions as to how to get rid of this disoloration.
Or do I have to live with it?

Thank you.