If you get a socket error when using the OCP4787 driver(QW787_Client.dll)
in your ..\Documents folder make sure you have both a
OC4BAv4_path.ini file
text should be
[Install info]
Path to OC4BAv4 programs="full path to your SIOC folder"
OC4BAv5_path.ini file
text should be
[Install info]
Path to OC4BAv5 programs="full path to your SIOC folder"
the text "full path to your SIOC folder" is in my case c:\Flightsim\SIOC
check your path and set the correct.