New router, cameras won't connect.

I understand this question has been answered before, but pressing the button is not working for me. I get a message saying it is asking to join the Ring network, I select join, but then I get a message saying it is unable to join. I got a new router, and I got my doorbell hooked up just fine, but not my cameras. I have tried numerous times. No, I can't change the name of my router to that of my previous router, because I do not have that information.