If you ever happen to reboot the server accidentally, just log in via ssh and run
/usr/sbin/asterisk -f
This will force asterisk to run with the hardcoded config files, rather than amportal, and you will still have a functioning pbx. I’m running it like this for the moment and waiting for an expert to come and help us 
And this “Whaa” thing appears on everywhere, and there is no information on the net about it. For example at the end of the loading section of asterisk:
[2015-05-06 12:17:05] ERROR[2330]: chan_unistim.c:6604 reload_config: Unable to load config unistim.conf
[2015-05-06 12:17:05] ERROR[2330]: res_clialiases.c:193 load_config: res_clialiases configuration file ‘cli_aliases.conf’ not found
Whaa
Whaa
Any ideas?