[jitsi-users] Error: connection failed

Hi there,

I have troubles with getting started using Jitsi. I've tried several XMPP-providers including jit.si but everytime I try to connect a window pops up stating: "ERROR: Connection failed for the following account: User name xxxx@jabber.xx, Server name: jabber.xx.
Please check your settings or contact your network administrator for more information"

Any experience with that? What am I supposed to do? I already tried changing port 5222 to 443 under Accounts --> Edit --> Connection but no success. Your help is highly appreciated.

Thank you