About extra space on the left of the editor

Hi,

I have the following code to initialize a syntax editor:

Me.tbFormula.Name = "tbFormula"
Me.tbFormula.Size = New System.Drawing.Size(586, 80)
Me.tbFormula.TabIndex = 0
Me.tbFormula.ScrollBarType = ActiproSoftware.SyntaxEditor.ScrollBarType.Both
Me.tbFormula.IndicatorMarginVisible = False

The problem is, even though I set Me.tbFormula.IndicatorMarginVisible = False, the text on the editor doesn't show all the way to the left. What is another property I need to set?
Thanks
Yuenho

[Modified at 04/01/2010 09:35 PM]