SSO from WSS to an ASP.NET 2.0 site - Den

I’m recently assigned to create a link on our sharepoint site(Created by
windows sharepoint service) which opens up an ASP.NET 2.0 web application.
Both our Sharepoint site and the ASP.NET 2.0
website use forms Authentication with membership provider. Both of them work
perfectly independently. But I have a problem in implementing the single sign
on idea on the ASP.NET 2.0 web site(launched from sharepoint site). To make
myself clear, once the user loges in to the sharepoint site, he should be
able to click on the link on the right side to open up the ASP.NET 2.0
website with out being asked to login again.
In order to implement SSO across applications, I did the following

On the WebConfig file of the ASP.NET 2.0 website
protection="All"  path="/"   timeout="30" enableCrossAppRedirects="true"  />
decryptionKey="A4A8A9FB2568E14C726182836C8744E4CBB84F4F1E4B9AD0"
validation="SHA1" />

On the WebConfig file for the share point site

protection="All"  path="/"   timeout="30"  enableCrossAppRedirects="true" />
decryptionKey="A4A8A9FB2568E14C726182836C8744E4CBB84F4F1E4B9AD0"
validation="SHA1" />
By doing this, I managed to make the ASP.NET 2.0 web app to use the
sharepoint login page, but once I key in the username and password, it
returns me back to the same login page.
Is there anything that I missed? Can somebody help on this? I just want to
remind you again that this is not MOSS. The sharePoint site is created by WSS
using the central administrationa and it is configured to use Forms
Authentication



For your Information
1)I have created the virtual directory for my asp.net 2.0 application under
the sharepoint application in the IIS
2)I manage to make it work for two non sharepoint ASP.NET 2.0 applications

SSO from WSS to an ASP.NET 2.0 site - Den

Anybody who is able to anwer this? If it can not be done, that is at least
one answer

Dene