Incomming call on X-Lite and Your session has been disabled

Hi.
One of my clients has very strange situation from past week. The system was running fine from April 2015.
Vicibox 6.0.3
SVN Version: 2540
DB Schema Version: 1460
Asterisk: 1.8.32.2-vici
Xeon 4 cores
8 GB RAM
SSD
Nothing was changed in clients network, server or Vicidial.
There are 7 Agents doing Outbound campaigns.
Agents log to system and doing their work.
Suddenly on random seat X-Lite start ringing (as it does when Agent log into campaign). X-Lite is set to AutoAnswer. Almost immediately Agent is kicked of the system with Your session has been disabled message.
Ia have checked that when this happens:
- internet connection is running fine (no ping loose do Vicidial server)
- no one is changing campaign or maybe logging on different user login or phone login
I have no clue what is going one.
One of my clients has very strange situation from past week. The system was running fine from April 2015.
Vicibox 6.0.3
SVN Version: 2540
DB Schema Version: 1460
Asterisk: 1.8.32.2-vici
Xeon 4 cores
8 GB RAM
SSD
Nothing was changed in clients network, server or Vicidial.
There are 7 Agents doing Outbound campaigns.
Agents log to system and doing their work.
Suddenly on random seat X-Lite start ringing (as it does when Agent log into campaign). X-Lite is set to AutoAnswer. Almost immediately Agent is kicked of the system with Your session has been disabled message.
Ia have checked that when this happens:
- internet connection is running fine (no ping loose do Vicidial server)
- no one is changing campaign or maybe logging on different user login or phone login
I have no clue what is going one.