When you published your mobile website and download the entire folder then simply download (right click and save target as) this file:
mobile-redirection.txt and open that txt file and copy the redirection code and paste on your roots index.php or index.html file or any other file you want to redirect to mobile site. (Be sure to updat the details to match your sites path) If you face any trouble in adding the mobile redirection code, then feel free to contact us with your website URL. We will be happy to assist you.