If your page shows momentarily before the redirect, it means there is another script in your website blocking our script and preventing it from executing before your page attempts to load.
Ensure our redirect script is placed just after the opening head tag in your website.
<head>
-- Our redirect code should be the first --
-- All other scripts in the header should be placed after our script --
</head>
<body>
-- Your website content --
</body>