Also, how are you processing your image upload? That function only sets the enctype.
By adding the following beneath your call to wp_insert_post you will be able to process your image upload,
if (!function_exists('wp_generate_attachment_metadata')){
require_once(ABSPATH . "wp-admin" . '/includes/image.php');
require_once(ABSPATH . "wp-admin" . '/includes/file.php');
require_once(ABSPATH . "wp-admin" . '/includes/media.php');
}
if ($_FILES) {
foreach ($_FILES as $file => $array) {
if ($_FILES[$file]['error'] !== UPLOAD_ERR_OK) {
return "upload error : " . $_FILES[$file]['error'];
}
$attach_id = media_handle_upload( $file, $pid );
add_post_meta($pid, 'meta_key_to_attach_image_to', $attach_id, false);
continue;
if ($attach_id > 0){
//and if you want to set that image as Post then use:
update_post_meta($pid,'_thumbnail_id',$attach_id);
}
}
}