Adding Ajax Action – 400

Hi I’m trying to use your code snippets to add a WordPress Ajax action, and it just gets 400. I’ve tried various differet JavaScript syntaxes for this and proven that the WordPress action is registered (via do_action). The URL is also correct.

PHP Code block (using CJ Toolbox)

function my_action() {
        echo "no bananas";
	wp_die(); 
}

// AJAX handling to get javascript returns
add_action( 'wp_ajax_my_action', 'my_action' );
add_action( 'wp_ajax_nopriv_my_action', 'my_actionX' );

Javascript call

var data = {
action: ‘my_action’,
whatever: 1234
};

// since 2.8 ajaxurl is always defined in the admin header and points to admin-ajax.php
jQuery.post(ajaxmw, data, function(response) {
alert(‘Got this from the server: ‘ + response);
});
`

Chrome Says : https://www.MYDOMAIN.co.uk/wp-admin/admin-ajax.php 400

Any help would be greatly appreciated.