Из записи richtexbox1 сохранение временно сохранено не постоянно в базе данных access

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я сделал запись из Richtextbox1, и когда я нажал кнопку Сохранить, Она была успешно сохранена, но когда я закрыл отладку и снова запустил ее, ее не было в Datagridview1, а также в базе данных Ms Access, пожалуйста, помогите мне в этом...

Примечание : когда я нажимаю кнопку AddNew без ввода значения, она говорит: "ExecuteReader требует открытого и доступного соединения. Текущее состояние соединения-закрыто."

Что я уже пробовал:

Imports System.Data.OleDb

Public Class SongEntry
    Dim Provider As String
    Dim dataFile As String
    Dim connString As String
    Dim myConnection As OleDbConnection = New OleDbConnection

    Private Sub Button7_Click(sender As Object, e As EventArgs) Handles Button7.Click
        TextBox1.Clear()
        TextBox2.Clear()
        TextBox3.Clear()
        TextBox4.Clear()
        TextBox5.Clear()
    End Sub

    Private Sub SongEntry_Load(sender As Object, e As EventArgs) Handles MyBase.Load
       

    End Sub

    Private Sub Button6_Click(sender As Object, e As EventArgs) Handles Button6.Click

        Provider = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source="
        dataFile = "C:\Users\User\Desktop\Worship\Worship\bin\Debug\Song.accdb"
        connString = Provider & dataFile
        myConnection.ConnectionString = connString
        myConnection.Open()

        Dim str As String
        str = "Insert into MAS_SONGS([SM_CODE],[SM_EDESC],[SM_TDESC],[SM_SONGL1],[SM_SONGL2]) values (?,?,?,?,?)"
        Dim cmd As OleDbCommand = New OleDbCommand(str, myConnection)

        cmd.Parameters.Add(New OleDbParameter("SM_CODE", CType(TextBox3.Text, String)))
        cmd.Parameters.Add(New OleDbParameter("SM_EDESC", CType(TextBox1.Text, String)))
        cmd.Parameters.Add(New OleDbParameter("SM_TDESC", CType(TextBox2.Text, String)))
        cmd.Parameters.Add(New OleDbParameter("SM_SONGL1", CType(TextBox4.Text, String)))
        cmd.Parameters.Add(New OleDbParameter("SM_SONGL2", CType(TextBox5.Text, String)))



        Try

            cmd.ExecuteNonQuery()
            cmd.Dispose()
            myConnection.Close()

            TextBox1.Clear()
            TextBox2.Clear()
            TextBox3.Clear()
            TextBox4.Clear()
            TextBox5.Clear()

        Catch ex As Exception
            MsgBox("saved")

        End Try


    End Sub

    Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click
        Me.Close()

    End Sub

    Private Sub SongEntry_KeyDown(sender As Object, e As KeyEventArgs) Handles MyBase.KeyDown
        If e.KeyCode = Keys.Escape Then
            Me.Close()

        End If
    End Sub

    Private Sub TextBox4_KeyPress(sender As Object, e As KeyPressEventArgs) Handles TextBox4.KeyPress
        If e.KeyChar = Convert.ToChar(1) Then
            DirectCast(sender, TextBox).SelectAll()
            e.Handled = True

        End If
    End Sub

    Private Sub TextBox1_KeyPress(sender As Object, e As KeyPressEventArgs) Handles TextBox1.KeyPress
        If e.KeyChar = Convert.ToChar(1) Then
            DirectCast(sender, TextBox).SelectAll()
            e.Handled = True

        End If
    End Sub

    Private Sub TextBox2_KeyPress(sender As Object, e As KeyPressEventArgs) Handles TextBox2.KeyPress
        If e.KeyChar = Convert.ToChar(1) Then
            DirectCast(sender, TextBox).SelectAll()
            e.Handled = True

        End If
    End Sub

    Private Sub TextBox3_KeyPress(sender As Object, e As KeyPressEventArgs) Handles TextBox3.KeyPress
        If e.KeyChar = Convert.ToChar(1) Then
            DirectCast(sender, TextBox).SelectAll()
            e.Handled = True

        End If
    End Sub

    Private Sub TextBox5_KeyPress(sender As Object, e As KeyPressEventArgs) Handles TextBox5.KeyPress
        If e.KeyChar = Convert.ToChar(1) Then
            DirectCast(sender, TextBox).SelectAll()
            e.Handled = True

        End If
    End Sub


    Private Sub Button4_Click(sender As Object, e As EventArgs) Handles Button4.Click
        MASSONGSBindingSource.RemoveCurrent()

    End Sub

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

        Try
            mySQL = "Select SM_CODE from MAS_SONGS ORDER BY SM_CODE DESC"
            ConnDB()


            myCommand = New OleDbCommand(mySQL, myConnection)

            myReader = myCommand.ExecuteReader(CommandBehavior.CloseConnection)

            If myReader.Read = True Then
                TextBox3.Text = Val(myReader(0)) + 1
            Else
                TextBox3.Text = 300001

            End If
        Catch ex As Exception
            MsgBox(ex.Message)
        Finally
            myCommand.Dispose()
            myConnection.Close()


        End Try
    End Sub


    Private Sub TextBox4_TextChanged(sender As Object, e As EventArgs) Handles TextBox4.TextChanged

    End Sub
End Class

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