QTR-Quadtone RIP

I am having a problem with creating a curve with the linearization 
data.  I have used both the 21 and 51 random patch, measured with an 
Eye-1.  When I paste the values from the QTR-Linearize-Data and hit the 
Create Curve button, I get the following error message.  Invalid 
linearize curve -- not constantly increasing. Curve creation failed. 

I have used constantly increasing density values and the values that 
come from the QTR Linearize Data program. I have double checked the 
actual values and they are constantly increasing, or in the case of the 
values from QTR Linearize, constantly decreasing.  I get the same 
problem with both.

Any ideas on what I am doing wrong? 

Thanks,

Bob