setting headers to servlet-response

Hello,

we search for some way in our application to avoid caching of pages 
received by the browser.

Therefore I wanted to set the Expires header to the current time:

response.addDateHeader("expires", cal.getTimeInMillis());

Neither with changing the name ("expires" vs. "Expires") nor using the 
setDateHeader method we had success. The header reches the client (e.g. 
Mozilla shows the header, but does not recognize it as "the real 
Expires-header". When using a telnet client and doing some

GET /our/path/start.do HTTP/1.1
Host: localhost

the received header is:
Expires: Thu, 01 Jan 1970 00:00:00 GMT

the epoch ... :((

I did not found any point where I could start searching for the problem. 
The output of logger.debug(cal.getTimeInMillis()) gives the correct 
time, as anticipated... :(

does anyone has an idea how to figure out the problem???


MfG,
   Stephan R.
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                     carpe diem, never regret



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