Problem with the start extension "s"

hello everybody, I have a “littl e” problem with the s extension.Indeed, it doesn’t function…But, I don’t know how to do in order to solve this problem…
Thank you in advance , I hope you willl answer me as soon as possible…

in what context are you trying to use the ‘s’ extension ? we’re not mind readers, and context’s i use that include the ‘s’ extension work perfectly.

post some config here first.