JavaScript Tracking Pixel Implementation

Trying to implement the following, which is supposed to generate a trackable phone number for a PPC campaign, in several areas on a site (the unique information has been changed for purposes of this post):

<!– start number replacer –>

<script type=”text/javascript”><!–

var vs_account_id = “0000000000”;

//–></script>

<script type=”text/javascript” src=”http://1179.xg4ken.com/media/number-changer/voicestar/number-changer.php”&gt;

</script>

<!– end ad widget –>

The content this script is supposed to replace exists in both sidebar and footer widgets. Thus, I attempted to insert this script using the enhanced text widget plugin. No dice. The space where there should be a phone number is black. I then attempted to put it directly in the footer.php file and the same thing happened: nothing.

Can anyone give me a clue as to how to implement this? Thanks for reading.