What I am using:
.NET 2.0; Sql express
Login Control with default provider and Membership and Roles
Local Database ASPNETDB.mdf in App_Data folder
Localization tags something like this...
I've tried the using the Authenticate handler of Login control and Membership.ValidateUser to no avail.
I've since taken out my 'fix attempts' so you can rest assured the current issue is the original one.