Linking my application page and my BDM

Hello to all,

I'm working on a mission management process, I created my application with Bonita following the rules that was shown to me in the getting started.

I made it as a suite:

Click create an application page.
Choose my BDM and put it on the page
Choose the elements I would like to see on the application and eventually let the attributes of my BDM match what will be displayed

Create a variable for connection of BDM and page

After modeling I save my page.

In my BDM there are data but on my page that I created the elements are not displayed I do not know why. I urgently need your help please

Best Regards