Connection issues with Adobe cirrus server

Hi,

I was wondering why does peer-to-peer communication done via the Adobe cirrus server works only when people are connected to the same Wi-Fi network. I am developing a game which uses the Adobe cirrus server and found out that when that game deployed to 2 phones and are both connected to a different Wi-Fi network, they don't seem to be communicating with each other. Is there a way I can get them communicating even when they connected to a different Wi-Fi network? I am using the netGroup class for the peer-to-peer communication. Any help is deeply appreciated!!