QTR-Quadtone RIP

I have been using QTR for almost seven years now, and I have recently run into an issue when using rolled paper on my 7800.  What happens is that I set up a custom size print, say 11x22 inches, and pick all the rest of my QTR stuff the way I normally do. The print preview on the CS5 print dialog box looks fine. But when I actually print, the printer won't go past the 8-½" width of a letter size sheet. 

I deleted the entire QTR installation using the instructions in the .pdf included with the distribution and reinstalled. Still having the problem. What is strange is that I can select sheet fed sheets larger than letter size, change the feed type on the printer from roll fed to sheet fed, and it works fine.

Any ideas? Has anyone else run into this? Do I need to reset the Mac printing system?