Digital BW, The Print

I am in the process of printing my first exhibition prints with the
following setup and need help ASAP this weekend.

 StudioPrint/Piezography - Selenium/Epson7600

Larry at Cone has helped me set the printer up, but since he and Peter from
ErgoSoft are at the PhotoEast show this weekend, I was wondering if anyone
on the list might have a similar configuration and help me with some
settings.

My major problem is getting prints with a slight posterization to them.

Some of my setting in StudioPrint:

Resolution: 1440 X 720 (When I tried 2880 X 1440, the print got much darker
and it still looked like the posterization was there).

Dithering: Stochastic

Print Direction: Uni Leftward

Quality:    Pass: MW2
            Dot Size: Micro

Since I receive this list in digest form, if you can help me out, please
respond to me privately at:

 markmaio@...

Thank you,

Mark Maio