i have a web application that export CSV and i logged in as admin but what happened during the exportation the IE opens a new tab and export the CSV but what happens next when you click any of the link on the web app you will automatically logout! This only happen on IE. here is the header i used: header("Content-type:application/vnd.ms-excel"); header("Content-disposition:attachment;filename=".$this->filename); I am using cakephp 1.3.x.x TIA :D