just a wag, but per chance, does this help?
from pcmagazine....
"October 15, 2002
Missing Network Printer
By Bruce Brown
I have a small laser printer with a network print server attached to the network in my office. The setup is configured with DHCP to get its IP address from the office router. Every few weeks or so, the router gets reset or is turned off. Whenever that occurs, the computers that have been configured to use that laser printer can no longer find it, and I have to reconfigure all of them to recognize the printer again. How can I set the network so the DHCP settings won't change?
Julie Newman
The answer is fairly straightforward: Use your network print server software to set a static IP address for the printer within the range recognized by your DHCP server. The address won't change, after you configure client computers on your network to find the printer at the designated IP address, even if you have a power outage and your DHCP reassigns IP addresses.
You should be able to find the addressable IP range in the router's software or firmware. Pick a relatively high address in that range, because when the DHCP server doles out addresses, it starts at the low end. For example, if the DHCP server has an address of 192.168.0.1 and is configured to support addresses up to 192.168.0.55, choose 192.168.0.54 or 192.168.0.55 for your printer. When you set the IP address for the printer, be sure you also set the subnet address to the same value as that used by the DHCP server. A common address is 255.255.255.0."
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