QTR-Quadtone RIP

Hi Folks,

I'm trying my first attempt at using Roy's Create_RGB_ICC program and I'm
getting the following error message:

WARNING: None of the RGB curves are in ascending order.
Cannot make the Soft Proofing side of profile.

I'm following Paul Roark's instructions on how to "Embedding Photoshop
Curves in ICCs".  I'm on a PC (XP) and using CS2.  Does anybody have
any ideas on what I've done wrong?

Thanks,

Richard Cooke
Lake Forest, CA