Cameras out of network range--Netgear range extender

Hi all, 

I have four Arlo cameras stationed around my house, and two of them are far enough from the router that they cannot get a signal. When I sync these cameras, a green square appears on my home page with the message, "Your device is not connected. Make sure it's connected to your router and has a working Internet connection." 

I recently bought a Netgear WiFi range extender (N300) to help with the weakness of the internet signal in the part of the house near those two cameras. For wifi generally, it works great. But it hasn't helped the connectivity of the cameras. I think this is because the extender creates a new network that is separate from the one the router and the cameras are connected to. Any suggestions about how to use the range extender to get the two remote cameras working? Thanks.