QTR-Quadtone RIP

I have been trying to build a set of curves for my Epson 1160, using
the UT2 inks.  When I load the QUAD1160-UT Printer Model, I can then
find four sets of curves for the 1160, two for UT and two for the VM inks.

However, when I try to create a curve, I cannot find these curves to
use as a starting point. 

Furthermore, when I try to build a curve from scratch, I can save the
curve just fine, but then QTRGUI doesn't find the recently-built
curve. I can't use it for a test print or go beyond the initial
curve-building step.

Am I doing something dumb here?  

Thanks for any help with this.

Dave Keasey