Creating Membership Provider at runtime.

Sometimes MS provides error message so silly that its hard to understnad and you feel like throwing away all things.
My Web.Config does not contain any entries of MemberShip, Role or Profile.
I want to create a membership provider dynamically through code at runtime. I wrote following code and it receives following error message.   I don;t know how come machine.config error appears in my application.  how annoying.
Parser Error Message: The connection name 'LocalSqlServer' was not found in the applications configuration or the connection string is empty.

Source Error:


Line 137: <membership> Line 138: <providers> Line 139: <add name="AspNetSqlMembershipProvider" type="System.Web.Security.SqlMembershipProvider, System.Web, Version=2.0.0.0, Culture=neutral, PublicKeyTo ...