Render jasper report as a HTML string

Hi,
I have following tag in my web page 
 
<iframe id="frame1" srcdoc="{!htmlResponse}" style="width:100%; height:100%;" scrolling="yes" border="0" frameborder="0" height="650" sandbox="" /> 
 
In {!htmlResponse} im getting formatted html of jasper report acceessd through HTML API. I can see srcdoc by inspecting element of my browser
but it is not rendering my report in browser.
when i get this {!htmlResponse} by hitting google.com or yahoo.com it renders in the page. but jasper report is not rendering in it. any idea ?