Google Adsense, won't work? Options

[lotus22]

I've been trying to put a google ad on my site for some time now and it will not work in the custom javascript box on the left?

Anyone got any ideas on how to get this code on to my xanga site?

<!-- begin code provided by createblog.com --><br /><script type="text/javascript"><!--<br />google_ad_client = "pub-2817464757803966";<br />google_ad_width = 125;<br />google_ad_height = 125;<br />google_ad_format = "125x125_as";<br />google_ad_type = "text_image";<br />google_ad_channel ="1649403272";<br />//--></script><br /><script type="text/javascript"<br />  src="http://pagead2.googlesyndication.com/pagead/show_ads.js"><br /></script><br /><br /><!-- end code provided by createblog.com -->

Thanks.