MultiHandlerSliderExtender code-behind

Hello,

I try to create a "MultiHandleSliderExtender" in code Behind, but that bug.

MultiHandleSliderExtender extender = new MultiHandleSliderExtender();
        extender.ID = "MultiHandleSliderExtenderAnneeDeNaissance";
        extender.BehaviorID = extender.ID;
        extender.Length = 350;
        extender.TargetControlID = Slider.ID;
        extender.Orientation = SliderOrientation.Horizontal;
       // extender.CssClass = "schedule-slider-dayrange";
        extender.EnableHandleAnimation = true;
        extender.HandleAnimationDuration = 0.1f;
        extender.ShowHandleDragStyle = true;
        extender.ShowHandleHoverStyle = true;
        extender.Minimum = 1920;
        extender.Maximum = 2050;


        List<MultiHandleSliderTarget> targets = new List<MultiHandleSliderTarget>();
        MultiHandleSliderTarget target = new MultiHandleSliderTarget();
        target.ControlID = TextBox1.ID;
        //target.HandleCssClass = "handle-x-left";
        targets.Add(target);
        extender.MultiHandleSliderTargets = new System.Collections.ObjectModel.Collection<MultiHandleSliderTarget>(targets);

        PlaceHolder1.Controls.Add(extender);I copied the error:

"Erreur d’exécution JavaScript: Sys.ArgumentOutOfRangeException: Value must be an integer.

Parameter name: x

Actual value was 24.052631378173828."

this bug only with IE 10 on Windows 8

If someone has an idea thank you in advance.