Richard, Assuming that you have at least a 3.0 brain box and that you have A10114A09 operating sys. with AVPSB014B boot chips try the following.
Make sure there are No credits on machine
Intall e-Key 7
Select Set-up then Communication, Protocol
From my memory Port should read Comm1 and Adress -Adress 1
Hit next
Change serial to SAS1, Hit Advanced and select Standard (For tito you use System)
Hit OK -Save and exit
Also in main device set up printer must be enabled.
Hope this helps B.
One more thing if it's a older operating system and boots other than what I stated other methods have to be used to set it up