Hello Mingeon Kim,
apart that you are running an unsupported firmware as you should be running UC Software 4.0.11 instead you MUST contact whoever set this up for you or provides this service for you.
NEXT ACTION: Please contact whoever setup this for you and work with them
Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.
Best Regards
Steffen Baier
Polycom Global Services