merge documents

Hi When i try to merge two documwnts i got error:
java.lang.NoSuchMethodError
        at com.cete.dynamicpdf.merger.g.getFilePointer(Unknown Source)
        at com.cete.dynamicpdf.merger.g.length(Unknown Source)
        at com.cete.dynamicpdf.merger.x.d(Unknown Source)
        at com.cete.dynamicpdf.merger.x.c(Unknown Source)
        at com.cete.dynamicpdf.merger.x.<init>(Unknown Source)
        at com.cete.dynamicpdf.merger.PdfDocument.j(Unknown Source)
        at com.cete.dynamicpdf.merger.PdfDocument.<init>(Unknown Source)
        at com.cete.dynamicpdf.merger.PdfDocument.<init>(Unknown Source)
        at com.cete.dynamicpdf.merger.MergeDocument.merge(Unknown Source)
        at Startup.main(Startup.java:23)
Exception in thread "main"
================================
my code is same as in example...
        public static void main(String[] args) {
        MergeDocument document = MergeDocument.merge(args[0],
                        args[1]);
        document.setCreator("MergePDFs.java");
        document.setAuthor("Your Name");
        document.setTitle("Merge PDFs");
                
        // Outputs the merged document to file
        document.draw(args[2]);
        }
=== what is wrong?

Hello,

Can you please tell us what version of JDK are you referencing? Currently our application only supports JDK 1.4.X or higher.

Thanks,
ceTe Software Support Team