Some additional information:
I am able to 'ping' 192.168.1.149 the IP address of the printer. I get the correct response that shows the printer should be On Line. The computer however is not able to print to the printer.
My computer operating system is Windows 7. I can work with the printer through the USB to Parallel configuration cable. The printe works fine with the the USB arrangement. Of course the computer configuration must be changed to the USB instead of the IP address.
Any ideas would be appriciated. I am starting to think this is a JetDirect card problem. I also put the card into a different LaserJet 4 Plus and got the same results.