Database Connection Problem

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C#

Hi All,
I m using C# windows program in Visual Studio 2005 with MS Access 2007 at run time I m getting error

oledb exception was unhandled error in vb.net ERROR CODE  -2147467259 

My code is below---

private OleDbConnection conn = new OleDbConnection();
       private string constr = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + Application.StartupPath.ToString() + @"\TVSIO.mdb" + ";Persist Security Info=False;";

       public SelectStyNo()
       {
           InitializeComponent();
           try
           {
               conn = new OleDbConnection(constr);
               conn.Open();  ->here getting ERROR
           }
           catch (Exception ex)
           {
               MessageBox.Show(ex.Message);
           }

Thanks & Regards
Indrajit Dasgupta