QTR-Quadtone RIP

Hi,

I'm hoping someone can help me, i'm kind of new to this and i'm attempting to create a profile for making digital negatives with Pictorico OHP on my stock Epson 1400. 

The problem i'm having is that all my test prints from the negatives thus far have been very light (which is to say, the negatives are too dark), too light yet to begin linearizing. I keep cranking the Gray_Shadow and Gray_Highlight up, and the Default_Ink_Limit down, but it seems wrong. the current working values are as follows: Default_Ink_Limit=14, Gray_highlight=10, Gray_Shadow=14, Gray_Gamma=1.2. This seems somewhat more extreame than it should be, based on other profiles i've seem. I am copying the K curve to CMY.

I'm guessing i'm probably making some kind of silly newby error, but can't think where...

-Ted