Cannot Switch to Wireless LAN

Use the network settings to switch from wired LAN connection to wireless LAN connection.
On the operation panel, select [Menu] in the [Home] screen, and press . [Home] Screen
Press [Preferences]    [Network]   [Select Wired/Wireless LAN]  .
The [Select Wired/Wireless LAN] screen is displayed.
If the login screen appears, enter the System Manager ID and PIN, and then press [<Log In>]  . System Manager ID and PIN
Press [Wireless LAN]  .
The message [Settings applied.] appears.
Connect the machine to the wireless LAN. Connecting to a Wireless LAN
Install the driver to the computer that will use the machine.
When switching the machine from wired LAN connection to wireless LAN connection, any installed drivers must be uninstalled and then reinstalled.
For details about uninstalling and installing drivers, see the driver manual at the online manual site.