Digital BW, The Print

Hi everyone,

I need help.
I'm using CISS with pigment ink then when I'm printing on 
microporous glossy paper the printing is coming Mat.
So in B&W it is nice even if it is not the result expected, but in 
color it is huggly. (big metametism)
I'm wondering if I have the right quantity of ink laydown on the 
paper.
When printed the separation file form QTR, the density of the colors 
are at the maximum around 60/80% but all are different.
Should I print with an adjustment of the ink density in the driver, 
and which one as the range is between 60 and 80%?
Is someone knows a RIP that could do the adjustment of the density 
of each ink for color printing?

I'm using PS CS2, QTR for B&W, Epson R2400, calibration Ezcolor 
(with scanner Epson 4490, very poor result with reddish cast)

Thanks for your help
Daniel Bourgade