It just doesn't work for me. I have the PC game USA version, but it doesn't work for me. Do you know anything in particular?

Yes, I've tried that.

livesplit must go on a specific route?

In LiveSplit settings, under layout make sure you have a Scriptable Auto Splitter section if not, add it in, edit it and select the DC2 autosplitter file where it asks for a file path. Sometimes you need to "Arm"the script by starting your timer manually as the game starts, each subsequent run should then start the timer automatically.

Not sure if that helps, but that's my normal trouble shooting with other IGT scripts.

don't worry if it doesn't work, it's not necessary to use autosplitter to submit a run. RTA timer is enough