Horizontal Scroll

Hi,

I've a table with 50 columns.
I'm trying to get horizontal scroll bar.
I added

$('#tbfstorico').DataTable({
"processing": true,
"serverSide": false, // for process server side

       "scrollX": true, <------THIS

        "filter": true,         // this is for disable filter (search box)
        "orderMulti": true,     // for disable multiple column at once
        "responsive": true,
        "pageLength": 10,
        "searchDelay":1000,
        "bAutoWidth": false,

but I can scroll only for 6 column on the right.... and the rest? why is not scrollin?

Regards