Getting a SQL Database Error...any ideas SQL experts?

I am trying to insert a value into a field in a database named ASPNETDB.MDF. The table name is "profiles_BasicProperties" and the field name is "UserID". I get an error when I attempt to do this. See the code I am using to try to do this below...and then the error that I get which is further down in this post. Note...both the code and the database are on my laptop. I can connect to the database just fine using Server Explorer in MS VS 2005. Thanks in advance for any help anybody can offer...

Here is the code I am using:

<%@. Page Language="VB" MasterPageFile="~/Master02.master" Title="Create Your Free Account" Debug="true"%>
<%@. Import Namespace="System.Data.SqlClient" %>
<%@. Import Namespace="System.Web.Configuration" %>

<asp:Content ID="Content1" ContentPlaceHolderID="ContentPlaceHolder_Main" Runat="Server">

<script runat="server">

Sub CreateUserWizard_CreatedUser(ByVal sender As Object, ByVal e As EventArgs)

Dim CWZ As CreateUserWizard
CWZ = CType(Me.LoginView1.FindControl("CreateUserWizard"), Wizard)

CreateUserProfile(CWZ.UserName)

Private Sub CreateUserProfile(ByVal UserName As String)

Dim conString As String = WebConfigurationManager.ConnectionStrings("Main").ConnectionString
Dim con As New SqlConnection(conString)
Dim cmd As New SqlCommand("INSERT profiles_BasicProperties (UserName) VALUES (@.UserID)", con)
cmd.Parameters.AddWithValue("@.UserID", UserName)
Using con
con.Open()
cmd.ExecuteNonQuery()
End Using

End Sub

</script>

...and here is the error and stack trace (the offending Line 49 is in bold):

Server Error in '/Site_Dev' Application.
------------------------

An attempt to attach an auto-named database for file ~\App_Data\ASPNETDB.MDF failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.
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: An attempt to attach an auto-named database for file ~\App_Data\ASPNETDB.MDF failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.

Source Error:

Line 47: cmd.Parameters.AddWithValue("@.UserID", UserName)
Line 48: Using con
Line 49: con.Open()
Line 50: cmd.ExecuteNonQuery()
Line 51: End Using

Source File: C:\Users\mdcragg\Documents\Website\Site_Dev\User_Create.aspx Line: 49

Stack Trace:

[SqlException (0x80131904): An attempt to attach an auto-named database for file ~\App_Data\ASPNETDB.MDF failed. A database with the same name exists, or specified file cannot be opened, or it is located on UNC share.]
System.Data.SqlClient.SqlInternalConnection.OnError(SqlException exception, Boolean breakConnection) +736211
System.Data.SqlClient.TdsParser.ThrowExceptionAndWarning(TdsParserStateObject stateObj) +188
System.Data.SqlClient.TdsParser.Run(RunBehavior runBehavior, SqlCommand cmdHandler, SqlDataReader dataStream, BulkCopySimpleResultSet bulkCopyHandler, TdsParserStateObject stateObj) +1959
System.Data.SqlClient.SqlInternalConnectionTds.CompleteLogin(Boolean enlistOK) +33
System.Data.SqlClient.SqlInternalConnectionTds.AttemptOneLogin(ServerInfo serverInfo, String newPassword, Boolean ignoreSniOpenTimeout, Int64 timerExpire, SqlConnection owningObject) +237
System.Data.SqlClient.SqlInternalConnectionTds.LoginNoFailover(String host, String newPassword, Boolean redirectedUserInstance, SqlConnection owningObject, SqlConnectionString connectionOptions, Int64 timerStart) +374
System.Data.SqlClient.SqlInternalConnectionTds.OpenLoginEnlist(SqlConnection owningObject, SqlConnectionString connectionOptions, String newPassword, Boolean redirectedUserInstance) +192
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
ASP.user_create_aspx.CreateUserProfile(String UserName) in C:\Users\Matthew\Documents\Group 02 - Politicore\Site_Dev\User_Create.aspx:49
ASP.user_create_aspx.CreateUserWizard_CreatedUser(Object sender, EventArgs e) in C:\Users\Matthew\Documents\Group 02 - Politicore\Site_Dev\User_Create.aspx:30
System.Web.UI.WebControls.CreateUserWizard.OnCreatedUser(EventArgs e) +105
System.Web.UI.WebControls.CreateUserWizard.AttemptCreateUser() +341
System.Web.UI.WebControls.CreateUserWizard.OnNextButtonClick(WizardNavigationEventArgs e) +105
System.Web.UI.WebControls.Wizard.OnBubbleEvent(Object source, EventArgs e) +453
System.Web.UI.WebControls.CreateUserWizard.OnBubbleEvent(Object source, EventArgs e) +149
System.Web.UI.WebControls.WizardChildTable.OnBubbleEvent(Object source, EventArgs args) +17
System.Web.UI.Control.RaiseBubbleEvent(Object source, EventArgs args) +35
System.Web.UI.WebControls.Button.OnCommand(CommandEventArgs e) +115
System.Web.UI.WebControls.Button.RaisePostBackEvent(String eventArgument) +163
System.Web.UI.WebControls.Button.System.Web.UI.IPostBackEventHandler.RaisePostBackEvent(String eventArgument) +7
System.Web.UI.Page.RaisePostBackEvent(IPostBackEventHandler sourceControl, String eventArgument) +11
System.Web.UI.Page.RaisePostBackEvent(NameValueCollection postData) +33
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +5102

------------------------
Version Information: Microsoft .NET Framework Version:2.0.50727.312; ASP.NET Version:2.0.50727.312

Looking around potential solutions seem to be:

1. Open SQL Server Management Studio and attach the .mdf file manually to the SQL Server. (Select the 'Databases' node, Right click and select 'Attach')

Now change your web.config and change the connection string to point to the pre attached database instead of auto attach.

2. SQLExpress creates a directory per user in "c:\Documents and Settings\[user name]\Local Settings\Application Data\Microsoft\Microsoft SQL Server Data\SQLEXPRESS" to store some information. Delete this directory and try again.

3. The windows account "ASPNET" must have write permission on the folder. If it is a Windows 2003 machine, provide write access to the account "NETWORK SERVICE" on the folder, instead of account ASPNET.

4. You may want to disable the "User Instance=true" and try.

5. Are you using beta versions of VWD, Visual Studio 2005 or SQL Server 2005 Express? Uninstall them andinstall the released versions.

6. User Instance=True will work only if your SQL Server 2005 Express is using Windows Authentication mode. It will fail if you are using mixed mode. (Select the computer name in the SQL Server Management Studio, right click and select 'Properties'. Select the node 'Security' to view/change the authentication mode)

7. Make sure your connection string is correct. It must be something like below:

"Data Source=.\SQLExpress;Persist Security Info=True;Integrated Security=SSPI;Initial Catalog=YourUserId_DatabaseName"

When you useIntegrated Secuiryt=SSPI in the connection string, make sure you are using<identity impersonate="true" /> in the<system.web> section of the web.config and also make sure to specify a valid windows account for the "Anonymous User" access section in IIS.