download problem

[vijay akni kumar]

In my application when ever i download a file i get a download manager if i say save it works fine but when ever i click on open it gives error message.
my code for download is

String fileName = rst.getString("filename");

response.setHeader("Content-Disposition","attachment; filename=\"" + fileName);
response.setDateHeader("max-age", 0);
response.setHeader("cache-control", "no-cache");
response.setHeader("Transfer-Encoding", "chunked");
response.setHeader("Transfer-Encoding", "deflate");response.setHeader("Content-Encoding", "en-US");
response.setHeader("Connection", "keep-alive");
response.setHeader("Expires", "0");
response.setHeader("Pragma", "no-cache");
OutputStream out = response.getOutputStream();
int off = 0;
int l = (int) rst.getBlob("docunemt").length();
out.write(blobdata, off, l);
out.flush();
out.close();
can any one tell me how to solve this problem is here any problem with headers that iam setting.