Aeotec smart switch 6 won't display watts

Hi I have setup smart switch 6, and is working, but wont update watts unless I toggle reset meter, then watts will show up, then I turn the switch off, watts stay the same until i toggle reset meter, then they go back to 0.
I set it up with paper UI, do i have to add anything to items or sitemap to get the watts to update on there own?

No one has any information on this?