Cannot Connect To Host On Netplay

[MeeteorDash]

I am usually play with my friends using the Dolphin 4.0-648 Netplay build but ever since I got my new internet I haven't been able to join the host. I have looked at other posts other people have made and I've tried everything but they never work. I've also tried to allow dolphin through the fire wall and turned off my fire wall but it still won't connect. Anyone know how to solve this?