GEtting error in itextsharp

Question

hai 

i want to copy the data from one pdf file to another pdf file when i am using  itextshap 5.3.2 dll this is working but old versions of the itextsharp dll

 i am getting the error Owner password required how can solve this problem

this ththis is my code

 string pdfTemplate = Server.MapPath("Templates") + "\\i-9.pdf";

                string newFile = Server.MapPath("Templates") + "\\newI9.pdf";

  PdfReader pdfReader = new PdfReader(pdfTemplate);

                PdfStamper pdfStamper = new PdfStamper(pdfReader, new FileStream(

                            newFile, FileMode.Create));

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