How to Use .NET SqlBulkCopy to Import an Excel File into SQL Server

Good Day:

I am using VB.NET 2005 with SQL Server 2000 to create a WinForms application.  I need to automate the process of importing an Excel file into an SQL Server database table for many users.  I created a test Excel file called test1.xls and created a range name for my Excel data called Quote.  I get an error that reads: Login failed for user 'Denise'.  I am confused because I can successfully log into my VB.NET/SQL Server application and perform all functions except for the following code:

 Private Sub PerformBulkCopy()

        Dim pRangeName As String = "Quote"
        Dim pFilename As String = "C:\test1.xls"

        sCon = oCon.SqlConString(frmLogin.oCon.UserID, frmLogin.oCon.UserPassword)
        Dim connectionString As String = sCon


        Dim l_strConn As String = String.Format("{0}{1}{2}{3}", _
                                               "Provider=Microsoft.Jet.OLEDB.4.0;", _
                                               "Data Source=", _
                                               pFilename, _
                                               ";Extended Properties=Excel 8.0;")

        Dim l_Conn As New OleDbConnection(l_strConn)
        l_Conn.Open()

        'Create Objects and grab data
        Dim Cmd As New OleDbCommand("SELECT * FROM " & pRangeName, l_Conn)
        Dim reader As OleDbDataReader = Cmd.ExecuteReader

        ' open the destination data
        Dim destinationConnection As SqlConnection = New SqlConnection(connectionString)
        ' open the connection
        destinationConnection.Open()
        Dim bulkCopy As SqlBulkCopy = New SqlBulkCopy(destinationConnection.ConnectionString)
        bulkCopy.BatchSize = 500
        bulkCopy.NotifyAfter = 1000
        bulkCopy.DestinationTableName = "BulkTest"
        bulkCopy.WriteToServer(reader)
        reader.Close()
    End Sub

Any suggestions or does someone have a good example?
Thanks,
Denise