Hi, i have the filters correctly declared, .. but i do not know if they work because i see nowhere the submit button.
When i press enter doesn't work, so i think it should be a button isn't?

You can set the "submit on change" toggle in the properties of the filter and than the changes are submitted right away when you change the value.

Filters...

A part I should review for the design and ergonomy.
It comes out really too raw.
Almost always ugly output in front-end.

I am gonna create something better.
Joomla uses JLayout to render it, wich is a good idea, but it does not handle correctly the inputs, and Cook cannot render the filters in there.
But the way I will propose you will be the same method, using a layout. (from the layouts/ folder).
This will be rewritten this winter if everything ok.

where i find the properties of the filter??

thanks in advance