One of the most common problems connecting a Jabber IM (CAXL) demo to a server via HTTPS is that your browser doesn't consider the server certificate to be safe. Here's how to find out if that's the problem. Paste the BOSH url to your browser to see if it returns back below
This URI is for XMPP communication via the BOSH protocol.
Please reference the following protocols:
If, instead, you get a certificate warning, that's why your Jabber IM (CAXL) application isn't connecting. You can either solve this temporarily by telling the browser to continue, anyway (after which, your application should work), or add the certificate to your trusted certificates in the browser.