Post screenshots of the ChatServer and how are you running it.
In DataServer.ini must be as next:
UseExDataServer = 1
ExDataServerPort = 55906
Make a backup of your IGC.DataServer.exe from DataServer folder and replace it with the one from the attachment.
ExDB is intergrated inside (as the .ini file is specifying)
The ChatServer must run using the shortcut with the following Target as next exemple:
C:/where_ever_you_have_it_path/ChatServer.exe 127.0.0.1
It should be connected. If not, please post screenshots, cause otherwise I can't understand what could be the problem.
