Make space between buttons in html editor

Hi, I have an ajax html editor (from toolkit). I want to make two lines (Panels) on top toolbar of editor and then add some buttons to first and some buttons to other.

some thing like this:

TopToolbar.Buttons.Add(New AjaxControlToolkit.HTMLEditor.ToolbarButton.Bold())
TopToolbar.Buttons.Add(New AjaxControlToolkit.HTMLEditor.ToolbarButton.Italic())
TopToolbar.Buttons.Add(New AjaxControlToolkit.HTMLEditor.ToolbarButton.Underline())

TopToolbar.Controls.Add(New LiteralControl("<br />"))

TopToolbar.Buttons.Add(New AjaxControlToolkit.HTMLEditor.ToolbarButton.Ltr())
TopToolbar.Buttons.Add(New AjaxControlToolkit.HTMLEditor.ToolbarButton.Rtl())

but it doesn't work and make space on top of toolbar and then list all 5 buttons near themselves.

I want to have it in this order:

Bold, Italic and Underline Buttons,

one <br> element,

RTL and LTR buttons

and then the rest of html editor.

Can anybody tell me how to do this?

Thanks in advance