Передача параметров сниппету

<?php
//---------------------------------------------------------------------------------
$script1 = "<script src='http://api-maps.yandex.ru/1.1/index.xml?key={$api_key}' type='text/javascript'></script>";
$modx->regClientStartupScript($script1);
//---------------------------------------------------------------------------------
$script2 = "<script type='text/javascript'>
        window.onload = function () 
		{
            var map = new YMaps.Map(document.getElementById('YMapsID'));
            map.setCenter(new YMaps.GeoPoint(37.64, 55.76), 10);
        }
</script>";
$modx->regClientStartupScript($script2);
//---------------------------------------------------------------------------------
echo "<div id='YMapsID' style='width:600px;height:400px'></div>";
?>

[[YandexMap? &api_key=`APojhkwBAAAA_dfZLQIB4Dv7NXd31nMl3wBvYTMGXFbV130AAAAAAAAAAACjaOvRXZxeKUkslK20upTbnO8tcQ==`]]

не верный ключ