Problem with CUPS and my USB Network printer

[Ciro]

Hi to all.

I tried to install a network printer (Samsung SCX-4100 USB) by CUPS over my linux/Ubuntu 6.10 box. I have a small wirless domestic LAN that uses USRobotics 9108A router/hub/print-server. USRobotics 9108A has a USB port for print-server function. In USRobotics router config/setup page the correct address of printer-service device is http://192.168.1.1:1631/printers/My_Printer.

My problem:
print-server function does work well by Windows XP (configuring, of course, Network printer http://192.168.1.1:1631/printers/My_Printer and adding just driver.inf from CD of vendor) but doesn't work under CUPS over Ubuntu or Mandriva.
Seems that the printer thath I've installed is configured correctly in CUPS (used just PPD driver downloaded from vendor support site) and it's in started status (green status) but when I launch Test-page, the icon printer becomes yellow (processing status) but nothing happens?
I can to give more information about.

Can you help me?

Thanks