Push notifications on Web Server

[mayasoft...@gmail.com]

Hi,

I need my app to be able to receive push notifications sent from the web server , I can send push messages from device to device but I haven't been able to send messages from the web server to my app. What do I have to configure in my server to be able to do this? 

PS. I am trying to use Codename One libs on the web server and I have an active Pro subscription.

Thanks.