Can not change Note font in VB API

Hi, I encountered an issue when I tried to insert a note to our drawing.  When we are using the same drawing for different project, I like to create a "stamp" like note on the drawing to indicate which project this drawing is used for. 

With the following code, I can set font height but cannot change the font. Although notestyle.getfont confirmed the font was applied, but when it showed, it reverted back to default font "Arial". 

Did I miss anything? 

 note = drawing.CreateDetailItem(noteInstructions)
 noteStyle = (New CCpfcAnnotationTextStyle).Create()
 noteStyle.SetHeight(FontHeight)
 noteStyle.SetFont("ARIALN.TTF") 
 note.SetNoteTextStyle(noteStyle)
 Console.WriteLine(noteStyle.GetFont)
 note.Show()