[support] help with FB button

I am running druap 6 .22, this should be simple, and I have done it before but it is just not working this time. I have generated the FB button:

<iframe src="// www.facebook.com/plugins/likebox.php?href=http%3A%2F%2Fwww.facebook.com%2Fplatform&amp;width=180&amp;height=258&amp;colorscheme=dark&amp;show_faces=true&amp;border_color&amp;stream=false&amp;header=false" scrolling="no" frameborder="0" style="border:none; overflow:hidden; width:180px; height:258px;" allowTransparency="true"></iframe>

in theory I should just paste the code in a new block. doesn't work, all I get is just code, it does not display the button .what am I doing wrong? how can I just have the I like it button in my drupal?