CreateImageryLayer License Required!

     I was very frustrated that my web application was run very well in server side,but when i view it in the client side, it always report that "License Required".

     I found the following code leads to the error:

 

var url = skRootURL + '/cloud/201009071100.png';
    var x1 = 91.848860;
    var y1 = 38.768197;
    var x2 = 151.323338;
    var y2 = 1.838574;

    try {
        var obj = globe.creator.createImageryLayer(url, x1, y1, x2, y2);
        if (obj == null) {
            alert(globe.lastError.description);
        }
        else {
           // alert('add OK!');
        }
    }
    catch (e) {
        alert(e.message);
    }

 

it runs very well in server side ,but how does the user to view the same result?