Download problem

Hi,
i have a problem when i implement the download code in JRun and in weblogic.

It is perfectly working in iPlanet.

the code is this only...



public void download(String strSaveAsfilename,String strFilename,HttpServletResponse res,HttpServletRequest req) throws  ServletException, IOException
{
    ServletOutputStream out= res.getOutputStream();
   res.setContentType("application/octet-stream; name="+strSaveAsfilename+"");
   res.setHeader("Content-Disposition","inline;filename="+strSaveAsfilename+"");
     
     try{
           ServletUtils.returnFile(strSaveAsfilename,out);
        }
        catch(FileNotFoundException fnfe){}
    out.flush();
    out.close();
}


ServletUtils is the class which is used to read the contents and write it.

The actual problem is
1. illegal state exception is thrown at the very first line itself.
ServletOutputStream out= res.getOutputStream();

How to solve this?

Expecting a solution as early as possible.
Thanx in advance,
SrinathR