Hello, I bought a 3-pack of deco M9 today and failed to set it up. I start to set up the main router using the app and it works fine untill the last step where i should connect to the wifi. When i try to connect to the wifi the red light comes on and it cant find any internet. I have tried using the old router and plugging in my computer directly to the ethernet cable coming from the "modem" and that works. Can anyone help me with this problem?