Hi,
you have a javascript errors on that page, select dynmic needs javascript without errors to work as any error breaks javscript processing:
Firefox
10:44:24:287 (ScrollScene) -> ERROR: Element defined in option "triggerElement" was not found: #section2
Crome
Uncaught TypeError: Cannot assign to read only property '_gsTweenID' of #compagnia TweenMax.min.js:16
2Uncaught TypeError: Cannot read property 'length' of undefined TweenMax.min.js:16