Digital BW, The Print

I made a set of sample prints of the same image  a couple of years 
ago, loading Paul 's curves for tones cool to sepia.  The prints are 
identical in all aspects except for the warm/cool color. I use MIS U7 
ink, a 7600 printer and HPR. The only difference is a new PC. When I 
load curves for carbon or sepia, the prints are washed out, the light 
tones disappear and the transitions are as jagged as they appear on 
the screen (in green and blue). Paul reminded me to setting  Adobe 
RGB 1998 to get rid of embedded profiles.  I thought that did it, but 
I still can't get a decent print and I hate to keep bugging Paul. 
He's been such a saint. The print is good when I use the sliders, – 
but that doesn't give me carbon or sepia.
 

Days later, a box of paper and gallons of ink later -  and loading 
curves still isn't working. I'm sure the problem is somewhere in the 
settings. Under Edit, I check"color management OFF" – or should it 
be "custom"? 
 Adobe RGB 1998 – 
CMYK ":US web coated (SWOP)y2". 
Gray gamma:" 2.2" Dot Gain: "20%:

Next: Under Color Management
            RGB: Should it be OFF or convert to working RGB ?
            CMYK: Off
             Gray: Off

 Conversion Options
Engine:  Adobe (ACE)
Intent: Relative colormetric? Perceptual? Saturation?  Which??

Should I check or uncheck Use black point compensation  ?
Check or uncheck: Use dither(8-bit channel image? 

Advanced Controls
 Check or uncheck        Desaturate moniotor colors by 20%
  Check or uncheck        Blend RGB colors using gamma 2.2

If anyone has the time and patience, I'd be very grateful for 
answers. I'd hate to give up on producing carbon or sepia. The 
carbon, especially, is part of my whole vision for the work I'm doing 
now.   
           Arlene