Here is the link for the wifi set up for the brother printer.
Following the steps should set up your printer to be seen wirelessly again.
IF that doesn't work....
please print the Printer settings and tell me if the "wireless link status" says "Link ok".
To print the Printer settings....
Using the control panel button:
Make sure that the front cover is closed and the power cord is plugged in.
Turn on the printer and wait until the printer is in the Ready state.
Press Go button three times within 2 seconds. The printer will print the current printer settings page.
Edited by code13, 15 October 2012 - 10:08 PM.