Error in changing VOIP provider

We just acquire new voip service, but after adding and enabling their settings to sip.conf and extensions.conf, we encountered problem. Vicidial interface shows "No Live Call" even though agents were able to talk to the customer. I dont know whats causing this problem.
Here is the settings of the old provider in extensions.conf:
; dial a local outbound number
exten => _9NXXXXXX,1,AGI(agi://127.0.0.1:4577/call_log)
exten => _9NXXXXXX,2,Dial(${TRUNK}/1727${EXTEN:1},,To)
exten => _9NXXXXXX,3,Hangup
; dial a long distance outbound number
exten => _91NXXNXXXXXX,1,AGI(agi://127.0.0.1:4577/call_log)
exten => _91NXXNXXXXXX,2,Dial(${TRUNK}/${EXTEN:1},,To)
exten => _91NXXNXXXXXX,3,Hangup
Here is the setting of the new provider in the extensions.conf:
;New VOIP
exten => _1.,1,AGI(agi://127.0.0.1:4577/call_log)
exten => _1.,2,Dial(SIP/${EXTEN}@newvoip)
exten => _1.,3,Hungup
;New VOIP long distance
exten => _011.,1,AGI(agi://127.0.0.1:4577/call_log)
exten => _011.,2,Dial(SIP/${EXTEN}@newvoip)
exten => _011.,3,Hungup
Here is the settings of the old provider in extensions.conf:
; dial a local outbound number
exten => _9NXXXXXX,1,AGI(agi://127.0.0.1:4577/call_log)
exten => _9NXXXXXX,2,Dial(${TRUNK}/1727${EXTEN:1},,To)
exten => _9NXXXXXX,3,Hangup
; dial a long distance outbound number
exten => _91NXXNXXXXXX,1,AGI(agi://127.0.0.1:4577/call_log)
exten => _91NXXNXXXXXX,2,Dial(${TRUNK}/${EXTEN:1},,To)
exten => _91NXXNXXXXXX,3,Hangup
Here is the setting of the new provider in the extensions.conf:
;New VOIP
exten => _1.,1,AGI(agi://127.0.0.1:4577/call_log)
exten => _1.,2,Dial(SIP/${EXTEN}@newvoip)
exten => _1.,3,Hungup
;New VOIP long distance
exten => _011.,1,AGI(agi://127.0.0.1:4577/call_log)
exten => _011.,2,Dial(SIP/${EXTEN}@newvoip)
exten => _011.,3,Hungup