QTR-Quadtone RIP

I am running an Epson 4000 with Cone's K7 selenium toned inks using roll paper.  I wanted 
to print a 17 x 36 and for some reason, the print shrinks down and only starts to print about 
8 inches wide.  Nothing I do can get the print to print properly.  The actual size of the image 
is 16.5 x 34 and I set up the printer in CS3 for 17 x 36.  I am running a Mac with Leopard.

Any help would be appreciated.

Thanks.

Mike