This is helpful when troubleshooting, or developing your page so that
you can see the error messages your pages may be creating in the
browser when the page is viewed.
First, go to the Tools menu. Click on Internet Options.
A window will pop up. In this window, go to the Advanced tab. Scroll down until you see a checkbox that states: Show friendly HTTP error messages. Uncheck this box, and then click OK.
You will now be able to see the actual errors generated by the server so that you can fix your code accordingly.