2 sql command 1 button error

Dim bError As Boolean = False
       Dim tdate As New Date
       tdate = System.DateTime.Now()

       Dim myConnection As New SqlConnection(Utility.CurrentConnectionString)
       myConnection.Open()
       Try
           If Page.IsValid Then
               Dim myCommand As SqlCommand = New SqlCommand
               Dim mycommand1 As SqlCommand = New SqlCommand
               myCommand.Connection = myConnection
               myCommand.CommandText = update command................;
               '  myCommand.ExecuteNonQuery()

               myCommand1.Connection = myConnection

               myCommand1.CommandText = insert command................;

               myCommand.ExecuteNonQuery()
            mycommand1.ExecuteNonQuery()

                 submitbtn.Enabled = False
           End If