Problem with SubDomain

[CalSun]

Hi all,
I created a virtual directory for my asp.net website and it works just fine.
When I move this website to a new subdomain, it's acting strange.
Problem: When I key in the address MyWeb.mycompany.com, it shows the first
page. When I login, the status bar says Done, but there's no content in the
page.

Thanks for your help.
-CalSun