servlet filter

Hello,
I wrote the followint doFilter method:
public void doFilter(ServletRequest arg0, ServletResponse arg1,
FilterChain arg2) throws IOException, ServletException {
        if (filterConfig == null)
             return;
        HttpServletRequest request = (HttpServletRequest) arg0;
        HttpServletResponse response = (HttpServletResponse) arg1;
        String contentType = (String)
request.getAttribute("JPServletContentType");
        if (contentType != null){
            //response.setContentType(contentType);

        }
        String conType =
(String)filterConfig.getServletContext().getAttribute("JPServletContentType");
        if (conType!=null) response.setContentType(conType);
        String expires = (String) request.getAttribute("JPServletExpires");
        if (expires != null)
            response.setHeader("Expires", expires);
        String cacheControl = (String)
request.getAttribute("JPServletCacheControl");
        if (cacheControl != null)
            response.setHeader("Cache-Control", cacheControl);
        response.setContentType("text/plain");
        long startTime = System.currentTimeMillis();
        arg2.doFilter(request, response);
        long stopTime = System.currentTimeMillis();
        System.out.println("Time to execute request: " + (stopTime -
startTime) +
            " milliseconds");

    {
when i started the server, I saw a debug message :
2007-08-29 11:56:25,759 DEBUG [tomcat.localhost./servlet.Context]
Starting filter 'jpServletFilter'

But it doesn't seem to run the code, since I wrote the
System.out.print and id doesn't print to the log!

b