Just moved this printer from my computer (usb) over to an office (network) and i cant seem to pick it up over the network

The network lights on the back dont light up. Ive reset the print server. (switching power on and off and holding "GO" down and pressing "GO" 7 times untill light comes on.

But still seem to have no luck. I have rang brother up and still waiting for them to ring me back.

I have changed network port/cable and still no luck.

Any idea will be greatfull