Digital BW, The Print

Hi all

I have successfully designed the black and light black curves and 
linearised using an eyeone. So far so good. However the tone of the 
print is anything but neutral. I think it looks a little green !! So 
I have been trying to use light cyan and light magenta curves to get 
a more pleasing tone. This part I have found very frustrating. Can 
anyone give me some tips or general advice on a logical way to 
proceed. 

Many thanks

Peter.