Custom Date field "range Search" does not show in "Popup Search"

Hello,

I Created a Date Field in the Accounts module called "Founded Date" and marked the "Range Search" property so i could find Accounts in a range of dates.

i added the field to the basic search and the Popup Search.

In the Basic Search i see the range search:

range3.png

But when i get inside Cases module and Create a new case and click on the Accounts relate field,

i see the Date Field without the range search in the Search Popup of Accounts:

range4.png

i read about it online.

i changed the row in file include/sugarFields/Fields/Base/SugarfieldBase.php from this:

return !empty($vardef['enable_range_search']) && !empty($_REQUEST['action']) && $_REQUEST['action']!='Popup';

to this

return !empty($vardef['enable_range_search']) && !empty($_REQUEST['action']);

So now i see it as ranged search but the date is ignored completely when pushing "Search" !

i choose "Equals to" = 2/3/2016 but it still shows the account with 9/3/2016 value in Founded Date field:

range5.png

how can i make the field take part of the search?

please help!

Using Sugarcrm CE 6.5.13