XML Java

This code works fine when I run it on Windows O/S using Websphere 3.5 but
not on Linux with Websphere 4. On Linux box xmlcontent variable contains a
lot of garbage instead of pure XML TAGS. Is it because XML is too big or
there are some characters in it. It works fine if I have small XMLtext.

public void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
        // Get Request xmlFile Variable

        String xmlcontent = request.getParameter("xmltext");
        String fileName = "xmldoc.xml";
        try {
                PrintWriter fileWriter = new PrintWriter (new
BufferedWriter(new FileWriter(fileName)));
                fileWriter.write(xmlcontent);
                fileWriter.flush();
                fileWriter.close();
        } catch (Exception e ) {
        System.out.print("Error Dumping XML.");
        }
}