paging comboboxes will not displayed in jtable

paging comboboxes will not displayed in jtable

I have downloaded the jtable demo for ASP.Net MVC and if I start the demo I have mentioned that there the "row count combobox" and the "got to page combobox" will not displayed. I tried to set the option "gotoPageArea" with the value "combobox" but this didn't solve the problem. Later I have mentioned that the demo has not the topical version of the jtable (2.4.0). I replaced the sourcefolder with the topical version but it has no impact.

Has anyone an idea how I can show the paging comboboxes?