Hi Chan,
Could you please check if you see any messages in the log like below:
06/26/2014 20:41:01.16 Slot-1: poePlusInit: Initialization failed Slot-1 DESWMUELEO13-OG4.2 # show inline-p sl 1 Timeout occured while retrieving information from hardware.Usually, we will have the poe plus init failure in the logs. May be this could be sent to the syslog server.