Automated IVR mini caller

Hello,
Need help with script to automatic call to numbers from list and connect to the IVR (freepbx).

I use Raspberry/FreePBX + USB Huawei Modem

[mini-caller]
exten => s,1,Answer()
exten => s,n,Wait(1)
exten => s,n,Goto(ivr-4,s,1)
exten => s,n,Hangup()

I already have a working script, but it is not stable.
Script use AMI to control the Dongle, because script is just runing in the console (not as an inside user).

PLEASE READ script file - attached

Script
1. Upload a file with a list of numbers
2. The script calls the number, after answering the call it connects to the IVR
3. After finishing the call, the script calls the next number