Check the following:

• The AC Adapter is connected properly and the Brother machine is turned on.
• The access point/router or hub is turned on and its link button is blinking.
• All protective packaging has been removed from the machine.
• The Front Cover, Separation Pad Cover and Pick-up Roller Cover are completely closed.

• For Web Based Management
  Start Web Based Management and access your Brother machine. When the Web Based Management screen appears, click the Network tab, and then click Network Status in the left navigation bar.
• For Control panel
  (Wired network)
  Press  (Settings) > Network > Wired LAN > Wired Status > Status. If the LCD displays Inactive or Wired OFF, ask your network administrator whether your IP address is valid or not.
  
  (Wireless network)
  Press  (Settings) > Network > WLAN > WLAN Status > Status. If the LCD displays Connection Failed, ask your network administrator whether your IP address is valid or not.

Ping the Brother machine from your computer using the IP address or the node name in the Windows command prompt or Mac Terminal application: ping <ipaddress> or <nodename>.

• Successful: Your Brother machine is working correctly and connected to the same network as your computer.
• Unsuccessful: Your Brother machine is not connected to the same network as your computer.
  Confirm that the IP address and the Subnet Mask are set correctly.