Loading jquery ui - ReferenceError: jQuery is not defined

I am following a simple tutorial to add dragging functionality to a composition.

I added this code to the creationComplete-event of the stage:

var onComplete = function onComplete() {

    alert('loaded"); // -> fired

     sym.$('blueDD').draggable();

     // throwing these errors in Firefox:

     //

     // ReferenceError: jQuery is not defined

     // TypeError: sym.$(...).draggable is not a function

}

yepnope({nope:['js/jquery-ui.min.js'], complete : onComplete});

Jquery UI is the newest one (1.11.2)

Questions:

* What am i doing wrong? Maybe its because JQuery UI is an AMD - Module?

* How do i know which version of jquery edge is currently using?

* Is it possible to "update" the jquery version that edge is using by my own?

Thanks, Ingo