Export icon is not showing on the footer of the grid, even though the export is enabled in the set actions. Please help me on how to make the export icon appear on the footer of the grid. Below is my line of code.

$g->set_actions(array(
"add"=> false, // allow/disallow add
"edit"=> false, // allow/disallow edit
"delete"=> false, // allow/disallow delete
"rowactions"=> true, // show/hide row wise edit/del/save option
"export" => true, // show/hide export to excel option
"autofilter" => true, // show/hide autofilter for search
"search" => "advance" // show single/multi field search condition (e.g. simple or advance)
)
);