HP JetDirect card - assigning a fixed IP

JetDirect card J3111A/600N (10baseT, RJ-45).

Logging into the card using a web browser, under Configurations tab, the
TCP 
options can be found. One of the choices is to choose whether the IP
address 
is assigned via DHCP, BOOTP, or Manually. 

From the drop-down menu I choose Manually and then click the Apply button
at 
the bottom of the window. (I left the IP address alone as it was fine; I
just 
want it to remain that address and not get reassigned by DHCP.)

When the window refreshed, the drop-down menu said "DHCP". I repeated the 
selection of Manual from the menu and again clicked the Apply button, but 
again, when the window refreshed the menu showed DHCP. 

I shut off the printer and restarted it; it showed the same IP address,
but 
I'm not sure if it is showing me its fixed address, or it's just that the 
DHCP router had assigned the same dynamic address to the printer. 

Has anyone come across this problem with JetDirect cards? Did I set a
fixed 
address? Will it remain the same? If not, how does one get around the
problem 
of the menu reverting to DHCP? 

Thanks,
-- 
Al, the usual