Problem solved! The audiocodes 310HD puts the DESTINATION address of Sip server in the wrong field. It did put in the SIP REGISTRAR field. The digitmaps and dialplan can be empty. Another mistaken is the EPM just has DIALPLAN field, and Audiocodes understand this field like digitmaps, and put one wrong NULL in dialplan rules.
I just fix the config file in the EPM editor, and now, my Audiocodes could be provisioned!