RichTextBox drag_drop event not firing

On my form load I have the code: Me.RichTextBox2.AllowDrop = True

Then I have the code below but the DragDrop event doesn't fire (even though other regular text boxes accept the drop)

    Private Sub RichTextBox2_DragEnter(sender As Object, e As System.Windows.Forms.DragEventArgs) Handles RichTextBox2.DragEnter
        e.Effect = DragDropEffects.Copy
    End Sub

    Private Sub RichTextBox2_DragDrop(sender As Object, e As System.Windows.Forms.DragEventArgs) Handles RichTextBox2.DragDrop
    <CODE HERE DOES NOT FIRE>
End Sub