How to hide a Column when Exporting DataTable into PDF file

Hello All,

I have tried to hide a Column from my Table when Exporting it into PDF file.

Code that below hides the column when pressing PDF Export-button but File Save as Dialog is not open...

How to get that Save as Dialog to work?

Thanks,

Mike

"fnClick": function (nButton, oConfig, oFlash) {
datatable.fnSetColumnVis(7, false);
$('div.dataTables_scrollHead').show();
$(window).keyup(function () {
oTable.fnSetColumnVis(7, true);
});
}