Ajax Star Rating无效

Question

以下是我目前的情况：

.starRating{
    width: 50px;
    height: 50px;
    cursor: pointer;
    background-repeat: no-repeat;
}

.FilledStars{
    background-image: url("filter star.png");
}

.WaitingStars {
    background-image: url("filter star empty.png");
}

.EmptyStars {
    background-image: url("filter star empty.png");
}

<asp:Panel ID="Panel1" runat="server">
    <asp:Button ID="btnPersonal1" class="btn btn-primary" runat="server" Text="Personal" ForeColor="White" />
    <asp:Button ID="btnAcademic1" class="btn btn-outline-primary" runat="server" Text="Academic" OnClick="btnAcademic1_Click" />
    <asp:Button ID="btnAthletic1" class="btn btn-outline-primary" runat="server" Text="Athletic" OnClick="btnAthletic1_Click" />
    <asp:Button ID="btnNotes1" class="btn btn-outline-primary" runat="server" Text="Notes" OnClick="btnNotes1_Click" />
    <asp:Button ID="btnSchedule1" class="btn btn-outline-primary" runat="server" Text="Schedule" OnClick="btnSchedule1_Click"/>
    <br />
    <br />

     <div>
    <asp:ScriptManager ID="ScriptManager1" runat="server"></asp:ScriptManager>
    <asp:UpdatePanel ID="UpdatePanel1" runat="server">
    <ContentTemplate>

        <cc1:Rating ID="Rating1" runat="server"
            StarCssClass="starRating"
            FilledStarCssClass="FilledStars"
            WaitingStarCssClass="WaitingStars"
            EmptyStarCssClass="EmptyStars"
            MaxRating="5" 
            CurrentRating="1">

        </cc1:Rating>

    </ContentTemplate>
        </asp:UpdatePanel>
       </div>
</panel>

我不确定为什么它不起作用。我已经多次查看图片网址并且一切都匹配。我只需要用户将自己的星级评分添加到页面中，但星星甚至没​​有显示出评分。