HP printer error or busy

My problem now is trying to install a wireless print server to my laptop. I
have a HP3940 which I can use through USB port. However, when I try to print
to it through the print server it won't work. I am 99% certain that I have
set everything up correctly, I can ping it, it says that it is ready and the
IP config page says that it has printed 8 pages successfully, is up and
running and is happy. BUT, when I send a test page to the printer, a message
appears in the print job window saying printer error or busy. Have tried to
search into what this may be but nothing yet.

Anyone?

Alison