Good Morning, Can any one help me here am a newbie in publishing my code on a domain after which i did i got an error which i don't even understand where its coming from and all thread i search has not helped either. Can anyone help here is the error from my site when my login button is clicked.
Invalid value for key 'attachdbfilename'.

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.ArgumentException: Invalid value for key 'attachdbfilename'.

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[ArgumentException: Invalid value for key 'attachdbfilename'.]
System.Data.SqlClient.SqlConnectionString.VerifyLocalHostAndFixup(String& host, Boolean enforceLocalHost, Boolean fixup) +893562
System.Data.SqlClient.SqlConnectionString..ctor(String connectionString) +5387365
System.Data.SqlClient.SqlConnectionFactory.CreateConnectionOptions(String connectionString, DbConnectionOptions previous) +24
System.Data.ProviderBase.DbConnectionFactory.GetConnectionPoolGroup(DbConnectionPoolKey key, DbConnectionPoolGroupOptions poolOptions, DbConnectionOptions& userConnectionOptions) +167
System.Data.SqlClient.SqlConnection.ConnectionString_Set(DbConnectionPoolKey key) +61
System.Data.SqlClient.SqlConnection.set_ConnectionString(String value) +66
System.Data.SqlClient.SqlConnection..ctor(String connectionString, SqlCredential credential) +26
System.Data.SqlClient.SqlConnection..ctor(String connectionString) +6
Eportal.MainSite.Login1_Authenticate(Object sender, AuthenticateEventArgs e) in C:\Users\Galaxytech\Documents\Visual Studio 2008\Projects\Eportal\Eportal\MainSite.Master.vb:12
System.Web.UI.WebControls.Login.OnAuthenticate(AuthenticateEventArgs e) +9855114
System.Web.UI.WebControls.Login.AttemptLogin() +119
System.Web.UI.WebControls.Login.OnBubbleEvent(Object source, EventArgs e) +75
System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args) +37
System.Web.UI.WebControls.Button.OnCommand(CommandEventArgs e) +114
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +252
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +10
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +13
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +35
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +1724


i'd be Glad if i can solve it been on it for 3days so say its my webconfig file but after much changes to my webconfig file nothing happened i still get the same error