Digital BW, The Print

Hi there
I'm new to this forum
I try to linearize with a Color Munki some of Paul Roark's excellent profiles  but I got the message after running the installer: Invalid linearize curve -- not constantly increasing.
I tried different set-ups  using the color munki B&W file from QTR and also the strip from
Keith Cooper. The print's dont look good. I see end the left side of the curve much more compressing then on the right side (QTR-Linearize-Data output file in TXT for the Mac.)
Does anyone have the same experience or can give me a solution?
Thanks
Mig