slick slider only working the first time in Jquery Mobile

I'm building an app in HTML5 with Jquery Mobile and I'm using the Slick slider for showing a gallery of images but it only works the firts time I change to the gallery page, the next ones it crashes.

$('#roller').on('pageshow',function(){
    console.log("TRIGGER");
    $('.divroller').slick({
        arrows:false,
        dots:false,
        infinite:false,
        slidesToShow:4,
        swipe:true,
        swipeToSlide:true,
        initialSlide:0
    });
});

the images are loaded from a JSON string that returns the html for the divroller div