title: captcha image being blocked by IIS
body: <p>I'm implementing captcha on my website like the one in <a href="https://web.archive.org/web/20210304122904/https://www.4guysfromrolla.com/articles/060706-1.aspx" rel="nofollow noreferrer">https://web.archive.org/web/20210304122904/https://www.4guysfromrolla.com/articles/060706-1.aspx</a>. It is working fine while running on VS2008. However, not when uploaded on IIS. I think the image is being blocked by IIS.. anyone knows how to fix this?</p>
  
  <p>thanks</p>