Thread:Extension talk:SubPageList/page & parent parameter and Magic Words

I'm currently trying to establish Subpagelist as an output in my whole wiki using templates. So basically this means that my "parent" page for Subpages can be variable. MediaWiki Syntax already provides me with a path, which *should* be allowing me to show my directories in all wiki pages.

The code is: 

I have tried this earlier with SubPageList3 but with the same results: Wiki Magic Words (as the one here used in the first line) seem to be fully ignored or simply read as string. In result i only see the subpages of my current page and not the "full" directory down to the basepage. Is there a way to achieve this?