form fields and Hebrew

I need to add form fields to Pdf document and set the language

of the selected form field for setting hebrew characters inside .

i have done that but i see garbage like the font i use is the wrong one .

The Code :

  Font4 := QuickPDF1.AddSubsettedFont('Arial',10,all_heb_letters);
  Font3 := QuickPDF1.AddTrueTypeFont('Arial', 1);
  Done  := QuickPDF1.AddFormFont(Font4);
  Done  := QuickPDF1.AddFormFont(Font3);

  QuickPDF1.SetFormFieldFont(1,1);
  QuickPDF1.SetFormFieldValue(1, hebstr );

  QuickPDF1.SetFormFieldFont(2,2);
  QuickPDF1.SetFormFieldValue(2,hebstr );

when i insert hebrew letters i will see garbage