Cannot Print Envelopes with Envelope Feeder

SYMPTOMS

When you try to print envelopes to a Hewlett-Packard (HP) 4/4M Plus printer under Windows NT 4.0 using the 4/4M Plus Post Script drivers that ship with Windows NT 4.0 and an HP envelope feeder unit, you receive the following error message:

This means that the printer driver does not see that there is an envelope feeder attached to the printer. Below is a list of the printer driver versions involved with this problem:

   Driver Name:    Pscript.dll
   Data file:      Hp4plus6.ppd
   Config file:    Pscrptui.dll
   Driver version: 4.01
   Environment:    Windows NT x86