But it is even Enabled in IE also. It seems it doesn't depend upon the browser.
Any other suggestions
as far as i saw what you're trying to do can't be done with httpwebrequest because the request only downloads html code from the website you provide. try to see if inside the html code you receive there is a script tag with path and try to get the code from the script file not the html.
or open the site in firefox with the firebug addon to catch the script path and send the path to the webrequest