JavaScript Error

When using meteor-slides directly on templating, I have this javaScript error :

Uncaught TypeError: Property 'undefined' of object #<Object> is not a function

Here is my DOM :

<div id="meteor-slideshow" class="meteor-slides  navboth" style="width: 960px; height: 320px; overflow: hidden; ">

			<ul class="meteor-nav">

				<li id="meteor-prev" class="prev"><a href="#prev">Previous</a></li>

				<li id="meteor-next" class="next"><a href="#next">Next</a></li>

			</ul><!-- .meteor-nav -->

			<div id="meteor-buttons" class="meteor-buttons"><a href="#" class="activeSlide">1</a><a href="#">2</a></div>

		<div class="meteor-clip">

			<img style="visibility: hidden;" class="meteor-shim" src="http://www.tycrep.fr/wp-content/uploads/2012/11/Galette-à-composer.jpg" alt="">
			<div class="mslide mslide-1" style="position: absolute; top: 0px; left: 0px; z-index: 3; opacity: 1; display: block; width: 960px; height: 320px; ">

					<!-- MLE -->
                            <div class="mslide-desc">
                                <h2>Galette du moment</h2>
                                                                    </div>
                            <!-- MLE -->
                            <a href="http://www.tycrep.fr/menus/les-menus/#61" title="Galette du moment"><img width="960" height="320" src="http://www.tycrep.fr/wp-content/uploads/2012/11/Galette-à-composer.jpg" class="attachment-featured-slide wp-post-image" alt="Galette à composer" title="Galette à composer"></a>

			</div><!-- .mslide -->

			<div class="mslide mslide-2" style="position: absolute; top: 0px; left: 0px; display: none; z-index: 1; width: 960px; height: 320px; ">

					<!-- MLE -->
                            <div class="mslide-desc">
                                <h2>menu galette + ty crep</h2>
                                                                    </div>
                            <!-- MLE -->
                            <a href="http://www.tycrep.fr/menus/les-menus/#67" title="menu galette + ty crep"><img width="960" height="320" src="http://www.tycrep.fr/wp-content/uploads/2012/05/slide-les-menus.jpg" class="attachment-featured-slide wp-post-image" alt="Les menus" title="Les menus"></a>

			</div><!-- .mslide -->

		</div><!-- .meteor-clip -->

	</div>

And the URL of the website :

http://www.tycrep.fr/

I can’t understand the problem. We got it since an update of WordPress.

http://ww.wp.xz.cn/extend/plugins/meteor-slides/