Hello, I can't get those layouts of autocross to work, I mean, they are in my data/layouts but they don't appear in game. What must I do?

u are a demo racer before u use autocross u need to S1 and u can make stuff when u get S2

That's not entirely correct - you just need any kind of licence to use/make layouts,doesn't matter if it's S1 or S2,but you can't use/make them with demo.

I have got s2 cracked, it doesn't count?

You should really buy LFS before asking for support on the LFS forum for features only available to paid licences.