Comment: Setting up a reference server

GnapZ: Thanks for yesterday's explanation but there must be something that is either missing or which I misunderstood.
This is what I did:
1- created a subdomain called home.sbv54.net
2- created empty folders yacs/scripts
3- unzipped yacs into home.sbv54.net/yacs/scripts/reference
4- tried to update my site called sbv54.net/sbv54 from the reference server home.sbv54.net
RESULT = Errors... (error line 20,....)
Then I did the following:
1- delete the yacs folder
2- installed yacs into home.sbv54.net/yacs
3- unzipped yacs into home.sbv54.net/yacs/scripts/reference
4- deleted all files from the home.sbv54.net/yacs directory so only the directories and their content were left
5- tried to update my site called sbv54.net/sbv54 from the reference server home.sbv54.net
RESULT = Errors... (about installing yacs correctly)
This is the current situation.

What did I do wrong?