I'm struggling to get a subtheme working and wondered if someone could show me what I'm doing wrong? I've followed the instructions here (http://doc.silverstripe.org/framework/en/topics/theme-development) and here (http://www.silverstriperesources.com/articles/customising-a-theme-using-sub-themes/), but my subtheme is just not being recognised.

My understanding from these articles is that you simply need to create a new theme folder with the same name as your 'master' theme, and suffix it with something like '_page' (then do your overrides in this folder). The articles don't say to do anything else, such as edit _config.php, or select the subtheme in the Settings admin section (both of which I've tried). However, when I do this what I'm expecting to see just doesn't happen.

I'll keep experimenting, but if anyone has any suggestions that would be great