exterior camara

Good morning,

I am trying to connect the 3^rd camara at our house. The other 2 work perfect.

Yestarday I was able to connect it with my iphone app, but it disconnected after a few minutes.

I have purchased a wifi repetear which is now next to the camara, and after a couple of tries, I connect the camara to my wifi, and once the message on the the iphone says Configurating camara, it stays like this all the time and I  cannot do anything.

Please help