If you already have port forwarding configured on your router, I would like to try and confirm that your port forwarding is functioning as we expect it to. If you visit this link in your computer's web browser:
http://portchecker.net/udp.php?p=12001... it will open a webpage that contains a Java Applet in it (similar to iCamWeb) that will be able to listen on port 12001 for a UDP packet to be sent from a server on the Internet to your computer.
If your port forwarding is functioning correctly then you should see a message saying that the port is "open." If it is not functioning correctly, it should say that it is blocked.
Please send a screenshot of your router's port forwarding configuration to
support@skjm.com so we can verify the settings. Also, please reference this forum post and your user name in your email.
Even though you are not receiving video, receiving Push Notifications is common. The Push Notifications use the Apple Push Notification Service, while the iCam connections are direct connections between the phone and the computer, so they don't really have anything to do with each other.