I want to connect to database with such connection string: connectionString="Data Source=220.127.116.11;Initial Catalog=test;User ID=user;Password=password"
So, I have default SQL Server instance (MSSQLSERVER) in my server. I found it as local in Management Studio. SQL server is running in mixed mode authentication. I added new login user/password. I attached database as test. I succesfully connect to SQL server as user/password in Management Studio. But when my web application try to connect to database, SqlException 'Login failed for user' is thrown. Webb application is hosted in IIS 7 in pool with Process Model LocalService.