To enable logfiles for troubleshooting problems regarding CrossfadeMixer*.ocx you need to create a file called CrossfadeMixer.INI which will be stored in your Windows folder (e.g. C:\Windows)

This file need to contain the following lines:

[Logging]
Filename=C:\DigaSystem\Logging\CrossfadeMixer.log
Active=TRUE
XML=TRUE

After saving the file and restarting the applications all CFM actions will be logged.