terryh4240 on "Inserting HTML into "text/html Widget", why some won't convert?"

I have tried inserting custom html into the "arbitrary text/html" widget, and some will not convert. For example, most recently I have tried to insert a customized survey made by survey monkey... and it will not show. Is there a reason some html code cannot show? How could I get it to show? this is the code I'm wanting to use:
<div id="surveyMonkeyInfo"><div><script src="http://www.surveymonkey.com/jsEmbed.aspx?sm=CtrC2xFNrRxYFm0g1sHGTA_3d_3d"> </script></div>Create your free online surveys with SurveyMonkey, the world's leading questionnaire tool.</div>