ASP.Net Captcha The resource cannot be found error in IIS 7 server while working on LocalHost

HI

I used numeric captcha in my website

http://www.aspsnippets.com/Articles/Free-ASP.Net-Mathematical-Captcha-Control-in-VB.Net-and-C.aspx

It worked correctly in Localhost  but when I upload my site on host when I open page that I used captcha for it, it didn't show captcha image so I can't enter captcha in textbox

Why this happen?

Best Regards

I use IIS6 but i try your code but again it didn't show any image

see here in code is   Path="Image.ashx" but i didn't have any file like that im my website? what is that?

when i see view source for captcha is below code

<img alt = 'Captcha' src = '/Image.ashx?key=potezmL9FvScT6cn0%2b2Jnnj3liguFvrFBT38H9ZMCHA%3d&color=%23000000' align = 'NotSet' /><input type = 'hidden' name = 'ASPNET_Captcha1_Expression' value = 'LL/VwR57t2e4qP5UmLxEDA==' /></span>

and when i click on SRC below error occure

The resource cannot be found.

Description: HTTP 404. The resource you are looking for (or one of its dependencies) could have been removed, had its name changed, or is temporarily unavailable.  Please review the following URL and make sure that it is spelled correctly.  Requested URL: /Image.ashx

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.272