I've had problems at a customer getting a Nokia IP45 into central management. Although the IP45 object exists in R65, there seems to be an error in its definition. In order to resolve this, you can use the old way of creating the IP45 using dbedit.
On the smartCenter, create a text file with the following contents called ip45.txt
modify sofaware_gw_types IP45 firmware_type nokia_ip45
modify sofaware_gw_types IP45 hardware_type IP45
addelement sofaware_gw_types IP45 interface_capabilities edge_robo_interface_capabilities
modify sofaware_gw_types IP45 interface_capabilities:0:name DMZ
addelement sofaware_gw_types IP45 interface_capabilities edge_robo_interface_capabilities
modify sofaware_gw_types IP45 interface_capabilities:1:name LAN
modify sofaware_gw_types IP45 interface_capabilities:1:can_be_disabled false
update sofaware_gw_types IP45
Disconnect all GUI clients
Now, using dbedit, run the following script on the management server:
dbedit -local -f ip45.txt
This will modify the IP45 object and you'll be able to manage an IP45.