QTR-Quadtone RIP

First I would like to thank Tom Husband for his reply to my previous 
post.

Now I don't manage to linearize the curve.
Details :
I am on WindowsXP, QTR 2.30, Epson 4000, ink Mis UT7, Paper Epson 
Semi-Gloss, Eye1 Photo.

I printed the "Ink Pattern Page" in calibration mode with 40%, 
scanned it in color 48bits 400dpi. In PS with eyedroper (5x5)I read 
the 100%value of each ink, compared it to the Black and read on the 
pattern the corresponding percentage.
In QTR I recorded these values under "Density" in the "curves 
creator" window and "ink setup" tab. Black being 100% C=52, M=73, 
Y=27, LC=22, LM=19, LK=37
Then I printed, not under calibration mode, the stepwedge 21 random 
and read the values with the Eye1. I saved the file and droped it 
into the Linearizing EXE and got this file :
Step	Lab	A	B	
0.00	93.56	-0.75	-5.01	-        b                 a  
|                         L   +
5.00	80.45	0.29	-1.03	-                        b    
|a                L           +
10.00	67.45	1.07	2.05	-                             |   
a   b L                   +
15.00	56.78	1.73	3.66	-                             |   L 
a       b               +
20.00	48.02	2.13	5.06	-                           L 
|       a           b         +
25.00	41.62	2.47	5.77	-                       L     
|        a             b      +
30.00	35.15	2.71	6.05	-                    L        
|         a             b     +
35.00	29.92	2.69	5.48	-                L            
|         a          b        +
40.00	26.05	2.52	4.60	-              L              
|         a       b           +
45.00	23.34	2.25	3.73	-             L               
|        a    b               +
50.00	20.49	1.92	2.49	-           L                 |      
a b                    +
55.00	19.27	1.72	1.88	-          L                  |     
ab                      +
60.00	17.68	1.15	0.69	-         L                   | b 
a                         +
65.00	16.98	1.13	0.24	-         L                   b   
a                         +
70.00	16.52	0.82	-0.27	-        L                  b |  
a                          +
75.00	15.89	0.33	-1.26	-        L              b     
|a                            +
80.00	15.71	0.12	-1.75	-        L             b      
a                             +
85.00	15.44	-0.24	-1.87	-        L            b      
a|                             +
90.00	15.62	-0.29	-2.06	-        L           b      a 
|                             +
95.00	15.37	-0.52	-2.50	-        L          b      a  
|                             +
100.00	15.29	-0.60	-2.67	-        L         b       a  
|                             +

LINEARIZE="93.56 80.45 67.45 56.78 48.02 41.62 35.15 29.92 26.05 
23.34 20.49 19.27 17.68 16.98 16.52 15.89 15.71 15.44 15.62 15.37 
15.29"

I then filled the linearization grid starting with the smallest 
value of 15.2 and carried on in the following order with 15.37 and 
so on.

I clic to create the curve, answer "Yes" to "save ink description" 
and got this message " Invalid Linearize curve - not constantly 
increasing - Curve creation failed ".

I understand that the ink densities values are not in a decreasing 
order, supposing there is one, but what to do ? That's the values I 
have !
Or is it something else I am doing wrong ?

I will be very greatful to and helpful hand.

Michel