my site: http://www.rexarts.com
Its a tumblr based site, but it is not showing Facebook Actions in Google Analytics for Like, Page Like, YouTube Subscribe, Google+ Join, +1 etc etc

i can only do little bit of coding, plz guide me

Code:
<script type="text/javascript">

var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-31937886-1']);
_gaq.push(['_setDomainName', 'rexarts.com']);
_gaq.push(['_trackPageview']);
(function() {
    var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
    ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
    var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();

</script>