QTR-Quadtone RIP

QTR experts I need your help.

Today I just started using UT7 inks with QTR and I'm baffled by the 
vertical and horizontal banding I'm experiencing with the 2200 on 
EEM.  Now....when I use Paul Roark's worflow/curves with the Epson 
Driver the banding disappears and the prints turn out great.

Weird huh?

Is this a QTR problem? A 2200 problem? An inkset problem?
I believe I'm using the correct UT7 Curves for QTR as generously 
provided to me by Daniel Staver but I wouldn't think that would be a 
factor.

Any suggestions?