Client certificate is not send

Question

Hi
I have not much experience in Java, so thank you in advance for your help.
I have some piece of client code which setup the secure connection. Everything works fine until I use server authentication (in my certificate store I have trusted CA certificate and client certificate signed by this trusted CA). In mutual authentication handshake fails, because the cliend doesn't send any certificate (i checked it using network sniffer). I was looking for the way of enumerate the local certificates which are going to be send from client, but I can't understand how should I do it. There is my code below :
     System.setProperty("-Djavax.net.ssl.trustStore","G:/Program Files/Java/jre1.5.0_07/lib/security/cacerts".replace('/', File.separatorChar));
     System.setProperty("-Djavax.net.ssl.trustStorePassword","changeit");
     System.setProperty("-Djavax.net.debug","all");
     int port = 16993;
   String hostname = "10.10.1.11";
    SSLSocketFactory factory = null;
    SSLSocket socket = null;
    SSLSession session = null;
    String[] proto = new String[1];
    String[] ciphe = new String[1];
    String[] all_ciphe_supp = new String[33];
    System.out.println("Cipher Suite and Protocols test");
  try {
        factory = HttpsURLConnection.getDefaultSSLSocketFactory();
              } catch (Exception e) {
                   System.out.println( e.toString());
              if (factory != null) {
             // Connect to the server
                   try {
                        socket = (SSLSocket)factory.createSocket(hostname,port);
                        all_ciphe_supp = socket.getSupportedCipherSuites();
                        System.out.println("All ciphersuites and protocol supported");
                        socket.startHandshake();
                        session = socket.getSession();
                        System.out.println("Connection established using " + session.getProtocol() + " and " + session.getCipherSuite());
                        socket.close();
                   } catch (SSLPeerUnverifiedException e) {
                        System.out.println("Connection not established : " + e.toString());
                   } catch (IOException e) {
                        System.out.println("Connection not established : " + e.toString());
}

Answer 1

Thanks a lot, it is a little bit better, I can see debug messages at the output :)
However the main problem still exists. In debug window I can see that client and CA certificates are added as trusted certificates, but no certificate is sent to server. Is it something wrong with certificate?
I have the certificate in following formats: .der .p12 .pem
I could only import .der using keytool (trying to import .p12 or .pem got Input not an X.509 certificate error), but using web browser I can use this certificate and mutual authentication goes ok.