title: jQuery DataTables : Header error
body: <p>I am using jQuery datatables V 1.9.4. This is my html code.</p>
  
  <pre><code>&lt;table id="file_list" class="file_list"&gt;
      &lt;thead&gt;
          &lt;tr&gt;
              &lt;th class="rowBorder"&gt;File&lt;/th&gt;
              &lt;th class="rowBorder"&gt;Date&lt;/th&gt;
              &lt;th class="rowBorder"&gt;Size&lt;/th&gt;
              &lt;th class="rowBorder"&gt;Type&lt;/th&gt;
          &lt;/tr&gt;
      &lt;/thead&gt;
      &lt;tbody&gt;
      &lt;/tbody&gt;
  
  &lt;/table&gt;
  </code></pre>
  
  <p>This is my js code for initializing datatable.</p>
  
  <pre><code>oTable = $('#file_list').dataTable(
          {
              "bFilter": false,
              "bInfo": false,
              "iDisplayLength": 50,
              "bLengthChange":false,
              "bPaginate": false,
              "sScrollY": 200,
              "bAutoWidth": false,
  
              }
          );
  </code></pre>
  
  <p>My problem is datatable header appears twice. How to solve this problem. Thanks in Advance.<img src="https://i.stack.imgur.com/pI4e0.png" alt="enter image description here"></p>