itext prototype

 I'm having trouble creating a prototype for the following java code:
 
 document.add(new Paragraph("Hello World") );

 Here's what I have so far:

 D jFileOutputStream...
 D                 S               O   CLASS(*JAVA
 D                                     :'java.io.FileOutputStream')

 D Document        S               O   CLASS(*JAVA
 D                                     :'com.lowagie.text.Document')

 D ITXTParagraph   S               O   CLASS(*JAVA                  
 D                                     :'com.lowagie.text.Paragraph')

 D AddParagraphToDocument...                                      
 D                 PR                  ExtProc(*JAVA:             
 D                                     'com.lowagie.text.Document':
 D                                     'add')                     
 D   peParagraph                       like(ITXTParagraph)        

  

 D PdfDocument      S                   LIKE(Document)
 D writerFile       S                   LIKE(jFileOutputStream)
 D ThisWriter       S                   LIKE(PdfWriter)

 D paragraph        S                   LIKE(ITXTParagraph)
  /free
  
   // Document is created without errors (PdfDocument)
   // file output stream is created without errors (writerFile)

  // Paraghraph is created without errors (paragraph)

  AddParagraphToDocument(Document:Paragraph);

  /End-free

 The error I get is: Message . . . . :   Java exception received when calling 
Java method.   
 Cause . . . . . :   ....Java exception "java.lang.NoSuchMethodError: add" when 
calling
   method "add" with signature "(Lcom.lowagie.text.Paragraph;)V" in class
   "com.lowagie.text.Document".                                          

 I've  checked everything and the spelling and capitalization is
 correct for the prototype.
 The jar file resides at /QIBM/UserData/Java400/ext, so this shouldn't be
 a classpath issue as far as I know.
 Can anyone tell me if they see anything wrong?

 Thanks

  

 Basilio