Http error 404 , Set Default page to my website

I'm trying to set default page to my site , but in every time it shows error .

My site was in windows server 2000, and now i want to transfer it to windows server 2008 (iis 7)

http://www.iis.net/learn/application-frameworks/running-classic-asp-applications-on-iis-7-and-iis-8/classic-asp-not-installed-by-default-on-iis

I do the config steps but every time it shows 2 error :

i already have default is (default.asp) . but the iis connot find it in the site , or something else

the default page in C:\inetpub\wwwroot

but it redirct to C:\inetpub\wwwroot\iishelp

why ???

another error : 

How I Can Do It ???