Hello,
One of the things to check is whether the device's time is properly synchronized. Access router's WebUI, go to Services -> NTP, select your time zone.
If the router does not sync, NTP service can be restarted. Access router via CLI using SSH client such as PuTTy or go to System -> CLI in the WebUI and enter this command:
/etc/init.d/ntpclient restart
Best regards,
Žygimantas
