51Cannot connect to the access point (the access point isnot detected)Before you proceed to Troubleshooting, confirm the following:• The USB cable is securely connected to the correct port.• The printer driver is already installed.• The printer is turned on. If it is, turn it off and then turn it on again.• There is no barrier or obstacle between the access point and the printer.Although wireless communication between rooms or floors is possible, the wireless communicationquality may become poor. The wall must be made of a material that allows radio waves to pass through.If the wall material prevents communication, set the printer in the same room as the access point.• Printing via USB connection is possible.• The firewall feature of security software may prevent proper setup or communication over a network.When setting up the printer for use over a network, disable the firewall of your security software duringthe setup.If you are using Windows XP Service Pack 1 or earlier and you have Internet Connection Firewallenabled, a dialog box asking you for confirmation to disable the firewall will appear during setup. ClickYes to disable the firewall. When setup is complete, the firewall will be re-enabled automatically.To confirm the version of your Windows XP, see “Confirming the version of Windows XP” on page 62.• When using a router, connect the printer and computer to the LAN side (same network segment).