A "fully fledged" network printer, comes with it's own network card, which plugs into a hub or router. It has it's own address, and therefore the computers on the network, print to that address.
Your printer (I believe) has a USB connection and is designed for connection to a USB port on a standard PC or MAC.
Probably, the only way around the problem, is to connect your printer to a print server, but it's a relatively expensive solution.
click here for an example.