QTR-Quadtone RIP

Carl Schofield,
Carl,
I have recently set up my 2400 printer and have just downloaded your QTR 
profiles for ESP using windows.
I tried one of your sepia and the print was way too dark. I have made 
several prints, the last with a -45 shadows and a -10 lightest, gamma. 
Still too dark.
The image is Tiff and it converts to grayscale on applying profile. The 
image prints ok in Epson ABW using an Epson SP profile.
I really want to use QTR and your profiles , any idea where I may be 
going wrong.
regards,
Peter.