第二个Wordpress Ajax不触发

嗨，我正在尝试使用一些wordpress ajax我的第一个ajax请求工作得很好，但第二个没有。谁能告诉我为什么会这样?

工作正常:

PHP

//Add Students Details to DB
add_action( 'wp_ajax_my_action', 'my_action_callback' );
function my_action_callback() {
	$fName = $_POST['fName'];
	$lName = $_POST['lName'];
	$dob = $_POST['dob'];
	$gender = $_POST['gender'];
	$diet = $_POST['diet'];
	$current_id = get_current_user_id();
	global $wpdb;
	$result = $wpdb->insert( 
		'wp_students', 
		array( 
			'ID' => NULL, 
			'first_name' => $fName,
			'last_name' => $lName,
			'birthdate' => $dob,
			'gender' => $gender,
			'dietary_requirements' => $diet,
			'user_id' => $current_id
		)
	);
	echo json_encode($result);
	wp_die();
}

JS

var data_value = {
                    action: 'my_action',
                    fName: $(acc[i]).find('input.fName').val(),
                    lName: $(acc[i]).find('input.lName').val(),
                    dob: $(acc[i]).find('input.dob').val(),
                    gender: $(acc[i]).find('select.gender').val(),
                    diet: $(acc[i]).find('textarea.diet_req').val()
                };
                $.ajax({
                    type: "post",
                    dataType: "json",
                    url: my_ajax_object.ajax_url,
                    data: data_value,
                    success: function(msg) {
                        if (msg == false) {
                            $('#insert_status').html('<strong><span style="color: red;">Error: </span></strong>Details Have Not Been Updated');
                            return false;
                        }
                    },
                    error: function(xhr, status, error) {
                        var i = JSON.parse(xhr.responseText)
                        alert(i.Message);
                    }
                });

不工作:

PHP

//Delete Students Details
add_action( 'wp_ajax_my_delete', 'my_action_callback_delete' );
function my_action_callback_delete() {
	echo 'here';
	global $wpdb;
	$result = $wpdb->delete( 'wp_students', array( 'usesr_id' => get_current_user_id()) );
	echo json_encode($result);
	wp_die();
}

JS

var value = {
                    action: 'my_delete'
                };
                $.ajax({
                    type: "post",
                    dataType: "json",
                    url: my_ajax_object.ajax_url,
                    data: value,
                    success: function(msg) {
                        if (msg == false) {
                            $('#insert_status').html('<strong><span style="color: red;">Error: </span></strong>Details Have Not Been Updated');
                            return false;
                        }
                    },
                    error: function(xhr, status, error) {
                        var i = JSON.parse(xhr.responseText)
                        alert(i.Message);
                    }
                });

如果你能帮我，那就太好了。Wordpress Ajax不像普通Ajax那样直接。

//Delete Students Details
add_action( 'wp_ajax_my_delete', 'my_action_callback_delete' );
function my_action_callback_delete() {
	echo 'here';
	global $wpdb;
	$result = $wpdb->delete( 'wp_students', array( 'usesr_id' => get_current_user_id()) );
	echo json_encode($result);
	wp_die();
}