If you are receiving an error message that your DHCP settings are incorrect, it's possible that your wireless network is set up with a static IP address. In order to connect your Wii console online, you will need to adjust the settings on your Wii console to match the DHCP settings on your computer. These settings can be accessed on your computer through the TCP/IP properties on your computer. For information on how to access your TCP/IP properties, click here.
DHCP settings may also be associated with your router's firewall. For information on firewall compatibility, please click here.