Oroblem in using struts framework

[Sa...@ubs.com]

hi gurus

I am using Struts to upload and download files from the server, although the upload works the fine the download is causing problems. The first time i click the download button it pops up the download dialog, but once the operation is done if i click any other button the same dialog box opens up. i figured it has to be some mystery of struts i have't quite got hold of. i am using the lookup dispatch action , the code i am using in the download action is as below.


		response.setContentType("application/x-download");
		response.setHeader("Content-Disposition","attachment; filename=" + fl.getName()); 

		ServletOutputStream sos = response.getOutputStream();	
		FileInputStream fis = new FileInputStream(fl);
		byte[] buffer = new byte[10* 1024];
		int nread = 0;
		while( (nread= fis.read(buffer)) != -1 )
			sos.write(buffer, 0, nread);      
		sos.flush();
		return null;

please help, i am at a total loss.
Thanks in Advance
Saurabh Gupta

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