Custom licencing database linked to wordpress through dll and mql4 not working correctly database in php

Current custom  licence system linked to my website not working correctly wordpress site with php database linked to mt4 software when customer makes purchase it activates a entry into database and communicates with dll on mt4  but isnt working correctly entries are going into the database but the connection between database and mt4 not seem to be working 

Developer of system not too reachable and need someone who can fix 

Alternatively i need to add expiry date and account numbers to source code and issue manually 

and if we cant repair i will also need help as i will need to prepare the codes so i can list on mql5

work will be subject to confidentiality of source codes and works. 

So you should be fairly well verced in the woocommerce wordpress and data bases as well as mql4