Scrollbar don't work

[GroophyLifefor]

I have a work which I use two scintilla in C# winform

first scintilla is okay, but second is not able to move down and don't show any scrollbar.

First scintilla -> BCode Second scintilla -> Code

frm.BCode.Styles[Style.Default].Font = "Consolas";
frm.BCode.Styles[Style.Default].Size = 10;
frm.BCode.Styles[Style.Default].BackColor = Color.FromArgb(40,42,54);
frm.BCode.Styles[Style.Default].ForeColor = Color.FromArgb(248,248,242);
frm.BCode.StyleClearAll();
frm.BCode.Focus();
frm.BCode.Lexer = Lexer.Batch;
frm.BCode.AutoCIgnoreCase = true;
frm.BCode.Styles[Style.LineNumber].BackColor = Color.FromArgb(40, 42, 54);
frm.BCode.Styles[Style.LineNumber].ForeColor = Color.FromArgb(248, 248, 242);
frm.BCode.Styles[Style.Batch.Comment].ForeColor = ColorTranslator.FromHtml("#6272a4");
frm.BCode.Styles[Style.Batch.Word].ForeColor = ColorTranslator.FromHtml("#ffb86c");
frm.BCode.Styles[Style.Batch.Label].ForeColor = ColorTranslator.FromHtml("#dcdc99");
frm.BCode.Styles[Style.Batch.Hide].ForeColor = ColorTranslator.FromHtml("#bd93f9");
frm.BCode.Styles[Style.Batch.Command].ForeColor = ColorTranslator.FromHtml("#c586c0");
frm.BCode.Styles[Style.Batch.Identifier].ForeColor = ColorTranslator.FromHtml("#358cd6");
frm.BCode.Styles[Style.Batch.Operator].ForeColor = ColorTranslator.FromHtml("#dccd79");
frm.BCode.KeyUp += BCode_KeyUp;
frm.BCode.CaretForeColor = Color.FromArgb(255, 184, 108);
frm.BCode.Click += BCode_Click;

frm.Code.Styles[Style.Default].Font = "Consolas";
frm.Code.Styles[Style.Default].Size = 10;
frm.Code.Styles[Style.Default].BackColor = Color.FromArgb(40, 42, 54);
frm.Code.Styles[Style.Default].ForeColor = Color.FromArgb(248, 248, 242);
frm.Code.StyleClearAll();
frm.Code.Focus();
frm.Code.Lexer = Lexer.Batch;
frm.Code.AutoCIgnoreCase = true;
frm.Code.Styles[Style.LineNumber].ForeColor = Color.FromArgb(248, 248, 242);
frm.Code.Styles[Style.LineNumber].BackColor = Color.FromArgb(40, 42, 54);
frm.Code.Styles[Style.Batch.Comment].ForeColor = ColorTranslator.FromHtml("#6272a4");
frm.Code.Styles[Style.Batch.Word].ForeColor = ColorTranslator.FromHtml("#ffb86c");
frm.Code.Styles[Style.Batch.Label].ForeColor = ColorTranslator.FromHtml("#dcdc99");
frm.Code.Styles[Style.Batch.Hide].ForeColor = ColorTranslator.FromHtml("#bd93f9");
frm.Code.Styles[Style.Batch.Command].ForeColor = ColorTranslator.FromHtml("#c586c0");
frmCode.Styles[Style.Batch.Identifier].ForeColor = ColorTranslator.FromHtml("#358cd6");
frm.Code.Styles[Style.Batch.Operator].ForeColor = ColorTranslator.FromHtml("#dccd79");

also I tried

frm.Code.ScrollWidth = 1;
frm.Code.ScrollWidthTracking = true;

But won't worked.