QTR-Quadtone RIP

I have been experimenting with Arcsoft panoramic stitching software and have
run into a problem where QTR just prints a black rectangle. I create the
panoramic image, save as a TIFF file, open in Photoshop and convert to
grayscale (making sure there are no layers etc). Adjust the image, size and
sharpen and save as a new TIFF file. Print from Photoshop to an Epson R1800
works OK, output from QTR a black box the size of the image. 
 
I am using version 2.4.2 of QTR and really hoping to get this to work as I
do not like the B&W output using the Epson drivers. Any thoughts or helpful
tips?
 
Thanks
 
Mike


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