When .aspx try to connect SQL server then show the following error, Any idea?
I already try to change Authentication mode to "SQL Server and Windows" but
still get the following error.
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Server Error in '/' Application.

Login failed for user 'fancywebadmin'. Reason: Not associated with a trusted
SQL Server connection.
Description: An unhandled exception occurred during the execution of the
current web request. Please review the stack trace for more information about
the error and where it originated in the code.

Exception Details: System.Data.SqlClient.SqlException: Login failed for user
'fancywebadmin'. Reason: Not associated with a trusted SQL Server connection.

Source Error:

Line 25:
Line 26:             SqlConnection conn = new
SqlConnection(ConfigurationSettings.AppSettings.Get("connectionString"));
Line 27:             conn.Open();
Line 28:             String HashedPassword =
FormsAuthentication.HashPasswordForStoringInConfigFile(password, "SHA1");
Line 29:

Source File: z:\fancydesignweb\login.aspx.cs    Line: 27

Stack Trace:

[SqlException (0x80131904): Login failed for user 'fancywebadmin'. Reason:
Not associated with a trusted SQL Server connection.]
  System.Data.SqlClient.SqlInternalConnection.OnError(SqlException
exception, Boolean breakConnection) +739123
 
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject
stateObj) +188
  System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand
cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet
bulkCopyHandler, TdsParserStateObject stateObj) +1956
  System.Data.SqlClient.SqlInternalConnectionTds.CompleteLogin(Boolean
enlistOK) +33
  System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo
serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, Int64
timerExpire, SqlConnection owningObject) +170
  System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(String
host, String newPassword, Boolean redirectedUserInstance, SqlConnection
owningObject, SqlConnectionString connectionOptions, Int64 timerStart) +349
 
System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection
owningObject, SqlConnectionString connectionOptions, String newPassword,
Boolean redirectedUserInstance) +181
 
System.Data.SqlClient.SqlInternalConnectionTds..ctor(DbConnectionPoolIdentity
identity, SqlConnectionString connectionOptions, Object providerInfo, String
newPassword, SqlConnection owningObject, Boolean redirectedUserInstance) +170
 
System.Data.SqlClient.SqlConnectionFactory.CreateConnection(DbConnectionOptions
options, Object poolGroupProviderInfo, DbConnectionPool pool, DbConnection
owningConnection) +359
 
System.Data.ProviderBase.DbConnectionFactory.CreatePooledConnection(DbConnection owningConnection, DbConnectionPool pool, DbConnectionOptions options) +28
  System.Data.ProviderBase.DbConnectionPool.CreateObject(DbConnection
owningObject) +424
  System.Data.ProviderBase.DbConnectionPool.UserCreateRequest(DbConnection
owningObject) +66
  System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection
owningObject) +496
  System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection
owningConnection) +82
  System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection
outerConnection, DbConnectionFactory connectionFactory) +105
  System.Data.SqlClient.SqlConnection.Open() +111
  login.Page_Load(Object sender, EventArgs e) in
z:\fancydesignweb\login.aspx.cs:27
  System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o,
Object t, EventArgs e) +15
  System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender,
EventArgs e) +34
  System.Web.UI.Control.OnLoad(EventArgs e) +99
  System.Web.UI.Control.LoadRecursive() +47
  System.Web.UI.Page.ProcessRequestMain(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1061
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