I want to access messages in GMail from a Java application using JavaMail and IMAP. Why am I getting a SocketTimeoutException?

Here is my code:

Properties props = System.getProperties();
props.setProperty("mail.imap.host", "imap.gmail.com");
props.setProperty("mail.imap.port", "993");
props.setProperty("mail.imap.connectiontimeout", "5000");
props.setProperty("mail.imap.timeout", "5000");

try {
  Session session = Session.getDefaultInstance(props, new MyAuthenticator());
  URLName urlName = new URLName("imap://[email protected]:[email protected]");
  Store store = session.getStore(urlName);
  if (!store.isConnected()) {
    store.connect();
  }
} catch (NoSuchProviderException e) {
  e.printStackTrace();
  System.exit(1);
} catch (MessagingException e) {
  e.printStackTrace();
  System.exit(2);
}

I set the timeout values so that it wouldn't take "forever" to timeout. Also, MyAuthenticator also has the username and password, which seems redundant with the URL. Is there another way to specify the protocol? (I didn't see it in the JavaDoc for IMAP.)