Can anyone help me?

I'm trying to use Nintendont to play Phantasy Star Online on the Wii U.

I did everything correctly, followed all the steps, but it keeps giving me the error "No. 015 Connection Attempt failed. Failed to retrieve IP address from DHCP Nintendont."

Have similar issues when conncting my WiiU to my router in my gameroom. When connecting to our main router problem is gone.