Print button problem, DataTables-1.10.7

Nikczemny

Hi guys, I installed datatables files, tables are formatted, sorted, just great no problem at all but when I tried to place print option of my table then print button doesn't come up, where is a problem?

<script>    
$(document).ready( function () {
    $('#lifts').DataTable( {
        dom: 'Bfrtip',
        buttons: [
            'print'
        ]
    });
} );
</script>

Thats the code placed under the table. Any ideas, advice? Please Help...