Digital BW, The Print

Hi everyone,

I am new to the group and new to printing high quality images.  I just received my Epson R2880 and am loving it.  I am trying to get acclimated to the printer.  One question I have.  My monitor is color calibrated and I am using Photoshop CS3 for all my color corrections.  Should I disable the color management system on the R2880?  Is this CMS basically just ruining all the adjustments I make in Photoshop?  Any help would be appreciated.    

I know that this group deals with b/w but I feel like it is even having an impact on my b/w images.  any help would be great.