What I did wrong was :
- Created new template and enter ecb2 tag
Created a new Design and added the newly created template to the design
Set the newly created design as default
Test the creation of a new page
The newly created Design was selected when adding a new page BUT because the template (also selected while created a new page) was not selected as default, the ecb2 tag did not work.
So al is working now. Set newly created design as default AND set NEWLY CREATED TEMPLATE AS DEFAULT.
Thanks for test Chris. Help me a lot.