Stupid question, have you rebooted the adapter?
If not set a PC to an ip address within the same subnet (as close as possible to the printer) then open a web browser and type in the IP of the printer, this will probably give you a web interface that you can use to reconfigure the adapter. (may have to plug in to the adapter directly with a pc)
However if it is anything like an old 3Com one I had you have to use a piece of software on your PC and plug directly in to the device itself.
You can download the user guide here in case you don't have it :- http://usa.kyocerami...s.jsp?rid=14679
From the user guide:-
If IP address assignment with DHCP is not desired, it may be disabled using the IB-100 Quick Setup wizard, the printer front panel, a web browser, or several other methods.
IMPORTANT: Note, however, that DHCP IS AUTOMATICALLY DISABLED when the IP address is set using any other method such as the Quick Setup wizard, printer front panel, etc.
IP Address Persistence
When the printer is turned off and back on will the IB-100 retain its IP address?
Temporary If a temporary lease is obtained from a DHCP server, then the IP address is temporary. That is, when the printer is turned off and back on, the IB-100 does not begin using its IP address until it has negotiated with a DHCP server. Thus, if a DHCP server is not available, the IB-100 will not have an IP address. This is necessary to prevent IP address conflicts in a DHCP environment.
Permanent If an unlimited lease or address reservation is obtained from a DHCP server, or if set by any method other than DHCP, then the IP address is permanent. That is, when the printer is turned off and back on, the IB-100 will begin using its assigned IP address.