Ququ

hmmmmmmm i solve it
the category must be in array

$post_ID = wp_insert_post(array(

'post_title' 	=> $post_title,
'post_content' 	=> $post_content,
'post_category' => array($post_category),
'post_status' 	=> $post_status,
'post_author'   => $post_author,
'post_date'     => $post_date,
'post_date_gmt' => $post_date_gmt
));