Download Dialog Box, From JSP

Question

I have sucessfully written a JSP page which allows the user to download a binary file to there drive, all that works fine.
However the initial diag box that comes up in windows, prompting you to save, open, or cancel has the name of the jsp page instead of the file to be downloaded. How can I set that to show the filename?
Here is my code:
<%
     FileInputStream fis      = new FileInputStream(filePath + fileName);
     BufferedInputStream bis = new BufferedInputStream(fis);
     response.setContentLength(fis.available());
     response.setContentType("application/octet-stream");
     response.setHeader("Content-disposition","attachment; filename=" + fileName );
     BufferedOutputStream bos = new BufferedOutputStream(response.getOutputStream());
     byte[] buff = new byte[1024];
     int bytesRead;
     // Simple read/write loop.
     while(-1 != (bytesRead = bis.read(buff, 0, buff.length)))
          bos.write(buff, 0, bytesRead);
     bos.flush();
     bos.close();
     bis.close();
     response.flushBuffer();
     fis.close();
%>
thank you for any help

Answer 1

I've done some investigating on my own in an attempt to solve this issue and have discovered that the reason it shows the JSP file name in the dialog box is because all JSPs seem to over load the http header file name variable.
I've looked in the .java files created by tomcat and I see where the header necessary to allow file download is constantly taken over by the JSP.
This is I suppose part of the technology, it's how they get JSPs to work. They had to know this all along and have done an excellent job of keeping it under wraps. I have just spent 3 months working 80 hours a week to meet a major deployment deadline and this file download issue that is being conveniently ignored by Sun is turning out to be a show stopper for my application.
THANKS SUN!!