QTR-Quadtone RIP

Hello,
I'm new & having a few questions as I go through calibrating.
I'm running Leopard.
I've made my ink descriptor file and printed the 21 step wedge. Using profile-maker measure 
tool, I measured the 21 step wedge. After a number of readings ( measuring by patch), I'm 
sure that I measured all the steps. I moved the printed patch high enough to see all the 
numerical divisions from the top of the step wedge in order to read each individual gray. 
After I have read all of them I'm asked to choose a file. Text file is chosen & saved to desk 
top. When I put this into the the QTR-Linearize-Data, a message appears at the bottom of 
the file, telling me 'The lab values are not in order, cannot be linearized'.
What am I doing wrong?
Thanks
Joel