Single sign on and membership .net 4.0

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C#

SQL-Server

SQL-Server-2008

, +

Hi,

Thanks in advance,

I am developing Single sign on using asp.net,c#net 4.0 and web services.
In my project i have three applications appl1,appl2 and appl3.

In my each application i have the web.config like this

<membership>
<providers>
<clear>
<add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider" connectionstringname="ApplicationServices">
enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="true" requiresUniqueEmail="false"
maxInvalidPasswordAttempts="5" minRequiredPasswordLength="6" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10"
applicationName="/" />



But here i want to create the users for each application with different application id in ASPNET_APPLICATIONS table in database.

Here in web.config file if i change the applicationName tag to appl1,appl2... and then i can create users with separate application ids.

But the problem is i want authenticate the Users with Username and password.If i authenticate users its showing that invalid credentials even i passed correct credentials.

I would be very thankful if anyone give the solution.
I Googled many websites but i am not getting correct solutions.

Thank you,