TableTools not working

marcoacm

I am trying to initialize a tabletool for my datatable and keep getting "undefined is not a function"

$(document).ready( function () {

var table = $('#mytable').dataTable();

var tableTools = new $.fn.dataTable.TableTools( table, {         // the error is here "undefined is not a function"
    "buttons": [
        "copy",
        "csv",
        "xls",
        "pdf",
        { "type": "print", "buttonText": "Print me!" }
    ]
} );

$( tableTools.fnContainer() ).insertAfter('div.info');

} );

I am doing exactly as in the documentation and nothing works.

I am importing the tabletools file properly (tested).
My datatable was created successfully.

Any thoughts. Please help...