The following section explains how to turn off friendly error messages in Internet Explorer. This is helpful when troubleshooting or developing your page so you can see the error messages your pages are creating in the browser when the page is viewed.
1) First, go to the Tools menu. Click on "Internet Options."
2) A window will pop up. In this window, go to the "Advanced" tab. Scroll down until you see a checkbox and "Show friendly HTTP error messages." Uncheck this box, and then hit "Okay."
3) You will now be able to see that actual errors generated by the server so that you can fix your code accordingly.