Hopefully someone can help with this.
Ive got two DCs connected to the Internet, one is set up with my BBA and is used for Q3 and PSO, it works fine.
My other DC has the standard modem and connects to the landline wall socket, and is connected to the net with a legit proper old-school dial up account.
I can get this to connect to the web via XDP and in game browsers like Chuchu etc, but it will not connect to any games.
This is my DNS setting:

This is the error message i get when I attempt to connect to Chu Chu Rocket game server

Maximum Pool and Toy Racer also dont work, but it WILL connect to Q3A (US version) and PSO.
HELP!