Instaling Tawk.to to forumotion forum [Solved]

I got this code from Tawk.to 

Code:

<!--Start of Tawk.to Script-->
<script type="text/javascript">
var $_Tawk_API={},$_Tawk_LoadStart=new Date();
(function(){
var s1=document.createElement("script"),s0=document.getElementsByTagName("script")[0];
s1.async=true;
s1.src='https://embed.tawk.to/527f05bb5347895631000004/default';
s1.charset='UTF-8';
s1.setAttribute('crossorigin','*');
s0.parentNode.insertBefore(s1,s0);
})();
</script>
<!--End of Tawk.to Script-->

Copied the code to curstom widget like i did with Cbox and nothing happend  .
My websites URL's : www.yugimania.forumsr.com/forum .

Hello Skitnica

For what is that code?