Digital BW, The Print

I am using QuadTone RIP and ran into a strange problem. I'm
printing 
with a 7500 and have been printing using the defined paper sizes in 
the program. I just tried to print an image on a 17X22 piece of 
paper. This size is not defined. I went to CUSTOM and set this size 
up. I then proceeded to try and print but the program will not pass 
the information to the printer. This only seems to happen with custom 
paper sizes and not with the predefined sizes. I'm not sure where
the 
problem is. QTR, Gimp-Print or Ghost? Has anyone else encountered 
this and have you solved it.

					John H