Asp.net Accordion Menu doesnt slide in UserControl

Hi everybody;

I use ajaxcontrol toolkit accordion menu. it is working fine in asp.net but when i put this code inside my usercontrol(.ascx) page. it doesnt slide and it doesnt change another menu item. where is the probelm.Here is my code;

<asp:ToolkitScriptManager ID="ToolkitScriptManager1" runat="server">  
</asp:ToolkitScriptManager>  
     
<asp:Accordion   
    ID="Accordion1"   
    CssClass="accordion"  
    HeaderCssClass="accordionHeader"  
    HeaderSelectedCssClass="accordionHeaderSelected"  
    ContentCssClass="accordionContent"   
    runat="server">  
<Panes>  
    <asp:AccordionPane runat="server">  
        <Header>Pane 1</Header>  
        <Content>  
        Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Maecenas porttitor congue massa. Fusce posuere, magna sed pulvinar ultricies, purus lectus malesuada libero, sit amet commodo magna eros quis urna.  
        Nunc viverra imperdiet enim. Fusce est. Vivamus a tellus.  
        Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Proin pharetra nonummy pede. Mauris et orci.              
        </Content>  
    </asp:AccordionPane>  
    <asp:AccordionPane ID="AccordionPane1" runat="server">  
        <Header>Pane 2</Header>  
        <Content>  
        Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Maecenas porttitor congue massa. Fusce posuere, magna sed pulvinar ultricies, purus lectus malesuada libero, sit amet commodo magna eros quis urna.  
        Nunc viverra imperdiet enim. Fusce est. Vivamus a tellus.  
        Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Proin pharetra nonummy pede. Mauris et orci.  
        </Content>  
    </asp:AccordionPane>  
    <asp:AccordionPane ID="AccordionPane2" runat="server">  
        <Header>Pane 3</Header>  
        <Content>  
        Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Maecenas porttitor congue massa. Fusce posuere, magna sed pulvinar ultricies, purus lectus malesuada libero, sit amet commodo magna eros quis urna.  
        Nunc viverra imperdiet enim. Fusce est. Vivamus a tellus.  
        Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Proin pharetra nonummy pede. Mauris et orci.  
        </Content>  
    </asp:AccordionPane>  
</Panes>  
</asp:Accordion>  

Best regards