Issues Registering Legacy Cisco 7911 with PJSIP on FreePBX 17

Along with other Cisco models that are currently running on my FreePBX 17, I want to register an older Cisco 7911 model using PJSIP. However, no matter what I do, it won’t register. Please guide me. Below is the XML file.

<?xml version="1.0" encoding="UTF-8"?> SIP cisco cisco D/M/Ya AUS Eastern Standard/Daylight Time 172.xx.xx.xx Unicast 2000 5060 5061 172.xx.xx.xx true 2 SIP11.9-4-2SR1-1S DefaultFP.xml false false 0 1 0 0 1 1 0,1,2 1 0 0,1 0 0 0 0 22 1,7 07:00 12:00 00:15 1 1 1 1 1 0 0,1,2 1 1 0 0,1 0 1 1 0 0,1,2 1 1 0 0,1 0 0 0 2 0 United_States United_States 64 1.0.0.0-1 1 0 http://cisco.internect.net/ 96 0 96 1 5 1 0 0 1 false 0 0 0 3804 false USECALLMANAGER 5060 USECALLMANAGER 5060 true true x-cisco-serviceuri-cfwdall x-cisco-serviceuri-pickup x-cisco-serviceuri-opickup x-cisco-serviceuri-gpickup x-cisco-serviceuri-meetme x-cisco-serviceuri-abbrdial false 2 true true 2 2 0 true true 6 10 180 3600 5 120 120 5 500 4000 70 false None 0 false true false false none 101 3 avt true true 3 false 2 false 10 false 10000 20000 5060 184 136 128 0 dialplan.xml Surgical-ICU 9 106 106 Surgical-ICU 106 USECALLMANAGER 5060 2 3 106 abc123 false 3 1 111 4 5 true false false true 4 2 21 LABEL BUTTON 1 EXTENSION OR NUMBER 1 21 LABEL BUTTON 2 EXTENSION OR NUMBER 1 21 LABEL BUTTON 3 EXTENSION OR NUMBER 1 21 Voice Mail VOICE MAIL NUMBER 0 Missed Calls Application:Cisco/MissedCalls Voicemail Application:Cisco/Voicemail Received Calls Application:Cisco/ReceivedCalls Placed Calls Application:Cisco/PlacedCalls Australian Services http://cisco.internect.net/