VTiger Integration: Originate failed

Hey Guys,

i have installed the vtiger asterisk connector as described in the official tutorial (sorry i am not allowed to add links)I am almost not, but it is still not working. If i click on a number in vTiger it says “Call failed”

Asterisk log shows:
WARNING[2054]: chan_sip.c:6225 create_addr: Purely numeric hostname (100), and not a peer--rejecting!

Asterisk vtiger connector webapp shows:

    016-12-13 22:39:06 [qtp1784662007-15] INFO  org.asteriskjava.manager.internal.ManagerConnectionImpl  - Successfully logged in
    2016-12-13 22:39:08 [qtp1784662007-15] INFO  org.asteriskjava.manager.internal.ManagerConnectionImpl  - Determined Asterisk version: Asterisk 1.6
    2016-12-13 22:39:08 [qtp1784662007-15] INFO  a  - Sending call originate request to asterisk
    2016-12-13 22:39:08 [qtp1784662007-15] INFO  a  - Context:vtiger_outbound
    2016-12-13 22:39:08 [qtp1784662007-15] INFO  a  - From: 100 -> To: +49xxxxxxxx
    2016-12-13 22:39:08 [qtp1784662007-15] INFO  a  - Outgoing Call Response: Error
    2016-12-13 22:39:08 [qtp1784662007-15] INFO  a  - Asterisk Response: Originate failed

My config is as following:
Vtiger Config

CRM Settings

Asterisk Server Details
Vtiger Asterisk App URL	http//////192.168.99.83:8383 // edited because not allowed links
Outbound Context	vtiger_outbound
Outbound Trunk	from-internal
Vtiger Secret Key	xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

in User CfG
CRM Phone Extension 100
Default Record View Summary Left Panel Hide No

ASTERISK VTiger Connector Config (VtigerAsteriskConnector.properties)

/*
 * Copyright (C) . All rights reserved.
 * @license Proprietary
 */
// Location where the application server will be running.
ServerIP   = 192.168.99.83
ServerPort = 8383
// Call Recordings storage path
StorageDir = /root/VtigerAsteriskConnector/calls
// Enable(true) or Disable(false) call recordings
Recording = false
// Location where the applications database files will be stored.
AsteriskAppDBPath = /root/VtigerAsteriskConnector/db
// Asterisk Server Details
AsteriskServerPublicIP = 192.168.99.83
AsteriskServerIP   = 192.168.99.83
AsteriskServerPort = 5038
AsteriskUsername   = vtiger
AsteriskPassword   = test123
// Vtiger CRM URL 
VtigerURL = http//externalip:999 //edited no links allowed, missing :
VtigerSecretKey = 554138266576c0ec05ce87
//Enable(true) or Disable(false) Asterisk Events and Database Logs in Connector
AsteriskLog = true
DatabaseLog = true

Asterisk / Freepbx Conf (config files read via Freepbx Admin-Config Edit)
extensions_custom.conf

; --- START ----[vtiger_inbound]
exten => +4933627982996,1,Agi(agi:///192.168.99.83/incoming.agi)
exten => _X.,1,Agi(agi://192.168.99.83/incoming.agi)
; --- END ---
; --- START ----;
[vtiger_outbound]
exten => _X.,1,Agi(agi://192.168.99.83/incoming.agi)
; --- END ---
;[vtiger]
;exten => _X.,1,Agi(agi://192.168.99.83/incoming.agi)

manager_additional.conf

;--------------------------------------------------------------------------------;;          Do NOT edit this file as it is auto-generated by FreePBX.             ;
;--------------------------------------------------------------------------------;
; For information on adding additional paramaters to this file, please visit the ;
; FreePBX.org wiki page, or ask on IRC. This file was created by the new FreePBX ;
; BMO - Big Module Object. Any similarity in naming with BMO from Adventure Time ;
; is totally deliberate.                                                         ;
;--------------------------------------------------------------------------------;
[cxpanel]
secret = cxmanager*con
deny=0.0.0.0/0.0.0.0
permit=127.0.0.1/255.255.255.0
read = system,call,log,verbose,command,agent,user,config,dtmf,reporting,cdr,dialplan,originate
write = system,call,log,verbose,command,agent,user,config,dtmf,reporting,cdr,dialplan,originate
writetimeout = 100
[vtiger]
secret = test123
deny=0.0.0.0/0.0.0.0
permit=127.0.0.1/255.255.255.0
permit=192.168.99.0/255.255.255.0
permit=192.168.99.83/255.255.255.0
permit=192.168.99.80/255.255.255.0
read = system,call,log,verbose,command,agent,user,config,dtmf,reporting,cdr,dialplan,originate
write = system,call,log,verbose,command,agent,user,config,dtmf,reporting,cdr,dialplan,originate
writetimeout = 100

i really appreciate any help!
Thanks so much
Mathias