QTR-Quadtone RIP

I am trying to print the ink separation page in QTR 2.6.2 on the Epson 7600 to test the Piezo special addition inks. I am printing in the calibration mode without changing the file from RGB to grayscale. I keep getting a very faint print that is not discernible. I have reinstalled QTR 2.6.2 for my OS 10.4.11 Tiger, and even uninstalled and reinstalled. I have successfully printed this in the past on the same 7600. I am printing at 100% with no advanced QTR adjustments. Can anyone give me some advise? Thanks