Maps - Multiple Markers

ExpressionEngine Code
{exp:reinos_maps:html_header}

{exp:reinos_maps:map 
    width="100%"
    zoom="3"
}
    {maps:add_marker
        address="heerde"
        popup:content="This is [location]"
    }

    {maps:add_marker
        address="Amsterdam"
        popup:content="This is [location]"
    }

    {maps:add_marker
        address="New york"
        popup:content="This is [location]"
    }
{/exp:reinos_maps:map}

{exp:reinos_maps:html_footer}