Efi ColorProof problem with Epson 9880

[sistecopy]

Hi...after receive the training about how to make the base linearization...I have a problem..

after put the total ink in the first step..(280% total ink) in the second test..the ink limit channel the last bar it a gray scale bar..from gray to solid black..but this bar it have something of yellow ink...????

I send the test form from photshop directly to the plotter and the bar don't have yellow ink..

any idea whats happen..

thanks