@Robert: I would say that having a static IP address is the preferred way. Feasibly if your router can lock an IP address to always assign that to the printer that could be ok but I can't guarantee it.
I'm not aware of anything else that might cause it not to work in regard to settings on the Konica. The control panel is a bit fiddly so just make sure that the settings are being applied properly when trying it.
Hope you get it working!