QTR-Quadtone RIP

I am having the same (or similar) problem using Photoshop CS2 & Leopard. I can go all the 
way through the "Print with Preview" workflow successfully, but afterwards, the print status 
monitor comes up, reports the job is 2% finished, then the job disappears as if finished, but 
nothing prints. There is no stuck job - I can print using CS2 without Quadtone. It seems, as 
mentioned above, that Quadtone has no access to the spooler. Once Photoshop/Quadtone 
processes the file, the spooler just dumps it or doesn't accept it and nothing happens.

I previously had Quadtone installed and working very well with Tiger. I uninstalled 2.5.1 
before installing 2.5.2, then installed the Leopard patch as directed.

Also, where is Quadtone located in Leopard? In applications? In Library/Printers? Or am I 
misremembering how things were set up in Tiger?

Thank you,
Jorn Ake