Syncronisation between 2 Osticket instances

Good morning guys,

My organisation has 2 instances of osticket running, lets call it Country 1 and Country 2.
They now want to sync specific tickets between the two instances.
How will i achieve this?

The setups are identical:
Os: Ubuntu Linux 14.04
osTicket Version     v1.9.12 (19292ad) — Up to date
Web Server Software     Apache/2.4.7 (Ubuntu)
MySQL Version     5.5.46
PHP Version     5.5.9-1ubuntu4.14
PHP Extensions
gdlib    
imap    
xml    
xml-dom    
json   
mbstring    
phar    
fileinfo    
PHP Settings
cgi.fix_pathinfo     "1" is recommended if AJAX is not working
date.timezone     Africa/Johannesburg

Firstly i have checked documentation on the API : http://tmib.net/using-osticket-1812-api, and i just cant seem to get it working, i keep getting the error "Unable to enable selected API key."

Can anyone suggest a method of achieving this syncronisation and perhaps point me to documentation of the API for V 1.9.12.