As long as you have first successfully installed the correct firmware and push module onto your camera keep in mind that it can take up to 5 minutes for the initial handshake to process.
If you close the camera info window in Admin portal and use the Refresh button it can tell you if it has connected. You can try restarting the device initially.
Following this, you will want to confirm the device is allowed to connect to WAN with your firewall settings. The easiest way to check that is by logging into the camera directly and navigating to the Time settings.
Set the device to use an NTP service like pool.ntp.org, and use the Test button to see if it has WAN access.