QTR-Quadtone RIP

Hi there,

We are running 2 Epson 7600 printers through Photoshop CS2 
on  G5's with Tiger. I have installed QTR and initially managed to 
get a few prints out of one of the printers. Now, however, when I 
attempt to print a Quad image, the printer dialog box simply 
displays "printer not responding". I can print regular colour 
images through the GIMP driver fine, and have double checked 
all paper sizes, cable connections etc...

Any hints?

Lorna