It's likely due to network complexities of ISP's between the 2 WiFi's. To correct the problem, ensure that you have uPNP enabled in your router settings, AND have the "auto config router" box checked in icamsource. If you're still having issues, you should set up manual port forwarding. It can be a hassle to set up manual port forwarding...but it is rock solid....you won't have any connection issues unless a network admin blocks those specific ports (or UDP traffic) used by iCam.
