Since I still have NO idea how you set this printer up, I can't tell you. If it was me, I would run Control Center in KDE, Peripherals, Administrator, right click, Add printer/class, and select Local Printer or Remote CUPS server. After that, I would enter kprinter -d nameofmyprinter \ as the command line to run in Mozilla for printing.
Of course, that's what I would do. Also, if I was asking a question on Linuxquestions.org I would provide all of the relevant information on my problem at hand like...oh I don't know... maybe what program I used to setup the printer. I would also Google for information on setting up my printer in Linux and check
www.linuxprinting.org.