Settings to use port 443 in Pigin

How should I configure things in Pigin to slip through firewalls that block all ports but 443 and 80? I've been able to configure Pigin to connect to Google's XMPP network; however, I can't connect to notify.me using similar settings. Specifically, I have set the following in the advance tab for the notify.me account:

Require SSL/TLS: unchecked (I also tried w/ this checked)
Force old (port 5223) SSL: checked
Allow plaintext auth over unencrypted stream: unchecked
Connect port: 443
Connect server: notify.me (I also tried secure.notify.me)
File transfer proxies: proxy.jabber.org
BOSH URL: blank

Any ideas or suggestions would be much appreciated!

(BTW, I looked for Pigin's logs, but only found chat related logs; if they would be helpful and you know where they are, please let me know.)

TIA!