Page Refresh Problem

i am trying out a WML,Servlet based Chat that retrieves the Message from the DB for a specified time delay, i use Nokia Toolkit 2.0 to test it.

The problem is the refresh happens only once and then the page is not updated.. anybody can pls suggest how to get rid of the problem.

code
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out.println("<head>");
out.println("<meta forua=\"true\" http-equiv=\"Cache-Control\" content=\"max-age=0\"/></head>");
out.println("<card id=\"msg\" title=\"" + username + ":Msg's\" ontimer=\"" + url + "\" newcontext=\"true\">");
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Roshini.S

instead of setting the headers using out.println() method set the header using response object.
response.setHeader("Cache-Control", "no-cache");
response.setHeader("Pragma", "no-cache");
response.setDateHeader("Expires", 0);