Hello
Your query is not clear enough.
You are using SQL Express 2005 and do not want to use aspnetdb, am i right? In order to do this 'you need to remove your Membership, Profile and Role provider sections from your web.config. These three sections maintain reference to providers database.
Remove below outlined sections from your web.config. You could manually remove these sections or alternative is to use Web site Administration Tool to do the same job.
<membership defaultProvider="AspNetMembershipProvider">
<providers>
<add connectionStringName="Your Connection String Name" enablePasswordRetrieval="false" enablePasswordReset="true" requiresQuestionAndAnswer="true" applicationName="/" requiresUniqueEmail="false" passwordFormat="Clear" maxInvalidPasswordAttempts="5" minRequiredPasswordLength="7" minRequiredNonalphanumericCharacters="0" passwordAttemptWindow="10" passwordStrengthRegularExpression="" name="AspNetMembershipProvider" type="System.Web.Security.SqlMembershipProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"/>
</providers>
</membership>
<!-- RG: Role provider-->
<roleManager enabled="true" defaultProvider="AspNetRoleProvider">
<providers>
<add connectionStringName="AspNetServices" applicationName="/" name="AspNetRoleProvider" type="System.Web.Security.SqlRoleProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a"/>
</providers>
</roleManager>
Let me know further Queries with your web.config source code.
Thanks,