Not registered message

I downloaded the app onto my android phone and then went online to try to lock my phone as a test to see if it worked and all I got was a message about no device being registered!
Any suggestions?

Hello Kathleen.
In order to assist you further, please click on the following link http://bit.ly/1EC8H4H and fill out necessary details and click on Email option. Our AVG mobile team will reply back to you via email as soon as possible.Please feel free to get back to us for any further assistance.
Thank you.