Digital BW, The Print

I just received my Easy BW (Neutral)cartridges today from MIS for my 
c82 and I'm pretty disappointed with the results thus far. I have 
made a bunch of prints on Epson Enhanced Matte paper and have found 
that they are all washed out looking; no deep, rich blacks. From the 
time I first heard of this new ink in early December and was 
actually able to order it a couple of weeks ago, I started playing 
around with BO printing a la Clayton Jones on my 2200, using MIS 
Eboni ink, and I find those prints much richer looking with a 
greater tonal range. Tonight I made several side by side comparisons 
and the BO looked better than the Easy BW every time. Here's my 
question: could it be possible that 1) I am doing something wrong 
with the c82 (although I am not sure what; using the Easy BW inks 
seems like a pretty turn-key operation) or that 2) one of the inks 
cartridges is mislabeled. One thing I didn't mention earlier is that 
after making my first Easy BW print, I realized that I had 
inadvertently installed the BW Photo Black cartridge. I replaced it 
with the BW Eboni, ran a couple of cleaning cycles, reprinted the 
image and found that the two looked identical! Any advice would be 
appreciated. Thanks!