Thanks, to make sure, this is the code that I need to insert:
<script type='text/javascript'>
var googletag = googletag || {};
googletag.cmd = googletag.cmd || [];
(function() {
var gads = document.createElement('script');
gads.async = true;
gads.type = 'text/javascript';
var useSSL = 'https:' == document.location.protocol;
gads.src = (useSSL ? 'https:' : 'http:') +
'//www.googletagservices.com/tag/js/gpt.js';
var node = document.getElementsByTagName('script')[0];
node.parentNode.insertBefore(gads, node);
})();
</script>
<script type='text/javascript'>
googletag.cmd.push(function() {
googletag.defineSlot('/55218023/300x250-300x600_MyPlayers', [300, 600], 'div-gpt-ad-1370262610550-0').addService(googletag.pubads());
googletag.defineSlot('/55218023/300x250_MyPlayers', [300, 250], 'div-gpt-ad-1370262610550-1').addService(googletag.pubads());
googletag.defineSlot('/55218023/728x90_Top_MyPlayers', [728, 90], 'div-gpt-ad-1370262610550-2').addService(googletag.pubads());
googletag.enableServices();
});
</script>