film2shoot;
Hello and welcome to the forums.
We need a little more information.
Printer manufacturer, model name, model number?
How is it being made available as a network resource? (hosted printer connected to another PC, if so which and what operating system) integrated network card or wireless radio in the printer?
Make sure that you have the correct Windows 7 (32 or 64 bit) drivers for the printer.
Also since it would appear that you have introduced a new computer into an existing network, make sure that all computer have the same workgroup name and if your other network computers are down level clients like (XP and or Vista) please avoid creating and or joining a "Home Group" with the new Win7 machine.