PHP code in a blank sidebox

[Lazar]

Hi,

I'm trying to put the php code below in a blank sidebox (Live Chat) but doesn't work. If the code is embeded anywhere other it works properly. Here is how my tpl_blank_sidebox.php looks like (the code is in the blue colour):

$content .= '<p> <!-- Start InstanteStore LiveChat -->
<div id="InstanteStoreLiveChat" align="center"><a href="http://www.instantestore.com/livechat_software.cfm" target="_blank">Live Chat Software</a></div>
<script defer="defer" type="text/javascript" src="//livechat.iestorechat.com/r/2754/A4ED1D2F7F1ECE08D5EF780898F38425/"></script>
<!-- End InstanteStore LiveChat --> </p>'; 

Many thanks.