Datacolor User to User Support Group.

Hello,
I have an Epson 3800 and am using Print Fix Pro with Epson Velvet Fine 
Art paper. I did a test for Grayscale Linearization that I found on the 
Northlight Images website. I profiled the EVFA paper using the 729 
patches plus the extended B&W. When I print it in B&W the center of the 
circle in the very dark areas has has defined tones and it not smooth 
in tone. When I print it using the Advanced Blank & White Epson mode 
the the gray tones are very smooth. I can use the ABW on this paper but 
want to profile other papers. Is this an issue of the profiling and I 
should do it again or a weakness of the profiling process? How 
successful have other been using Print Fix Pro for B&W?
Thanks,
Gary W.