For Brother MFC 8460 N and HL 4040DN computers, they both went offline on 8/28/14, coincidentally with some Windows security updates (Windows 7). I resolved the issue by tweaking the configuration of the ports. Highlight the icon in the device window, right click, click Printer Properties, be sure the IP address appears in the Printer Name or IP field (get it from printing out your properties from the printer menu). If this doesn't resolve it, then change the Protocol from LPR to RAW. I only needed to make the change on one of our network computers, so it solves it for W7 32 bit and 64 bit OS. Good luck.