USB Printer Setup

[Tom George <georgeacct@spininternet.com>]

I am runing 2.2.18pre21 with modules and usb printer module configured.  
I have an Epson Stylus Color 860 connected to the USB port and it works 
with that other system.  I have run

  mknod /dev/usb/lp0 c 180 0

and modified printcap to

  lp=/dev/usb/lp0

When I try to print a test file with the command

  lp testfile

I get an acknowledgement that I have requested a print job and lpq 
reports an active job in the que but nothing prints.

What is missing from my setup?