Inserting CSS and JQuery in Module

[musicscore]

Hi there again.

While building my first module I want to insert a jquery script and a css file while openen action.default.php
So when the module frontend is opend in the frontend, the css and the jquery is applied.

I tried this (and a lot of other options) but without result.

viewtopic.php?p=350093&hilit=jquery#p350093

Please can you tell me if this methode should work

T.I.A for any tip.