Hi! Has one week that i have this problem.
I'm learning with Aspsnipets in this tutorial
http://www.aspsnippets.com/Articles/Simple-User-Login-Form-example-in-ASPNet.aspx
In my registration page is everything working fine. I'm receiving user registration confirmation , ....
But in my login i have a problem! Some months ago was everything working fine .But nowadays i'm receiving error and error.
My solution was: execute this query
exec sp_configure 'user instances enabled', 1.
GO Reconfigure
later, deleted this folder :
C:\Documents and Settings\{YOUR_USERNAME}\Local Settings\Application Data\Microsoft\Microsoft SQL Server Data\{SQL_INSTANCE_NAME}
and restart my computer. !
ok , when I restarted my computer ,I had success ,but every time when I restart the visual studio and my web application , I receive again this error .
What can I do?
My connection string:
<connectionStrings>
<add name="constrA" connectionString="Data Source=LEORETORICO;Initial Catalog=LoginDB;user id=Leo;password=numbers" providerName="System.Data.SqlClient" />
</connectionStrings>
<appSettings>
observation: it's my string in webconfig inside the path : account.
] I have another webconfig ,like the same generated
by web application in visual studio.


My problem is only with login! Thanks for your help!