i think the problemis diffrent beacause i fixed that and still nothing....
<div class="gradient"></div>
<div class="demo">
<img class="logo" src="img/dubi.png"/></div>
<script src="http://cdnjs.cloudflare.com/ajax/libs/gsap/1.17.0/TweenMax.min.js"></script>
<script src="js/main.js"></script>
document.addEventListener('DOMContentLoaded', function() {
TweenMax.toTweenMax.to(".logo",2,{left:600});
});