An ABS does NOT work from simply putting in a script, usually you'll need to configure your project to use that script.
Please go into the XAS description and manual and follow the instructions there on how to install that system into your project.
If there is anything you don't know, then you can ask specific questions on "how to do point XY of the instructions".
However, it looks to me like you're a complete new user, and in that case I suggest you start by making a small game without scripts, just to learn how to handle the editor and the engine. If you need help with the basics, you can start at the link in my signature.