IE9下 TabContainer（Ajax Tab页控件）控件有些电脑不能显示

IE9下 TabContainer（Ajax Tab页控件）控件有些电脑不能显示，有些电脑能显示，请问是什么原因？
急，高分求助，IE8没有问题 --------------------编程问答--------------------   <div id="bodycontent" class='MainList'>
            <asp:UpdatePanel runat="server" ID="udp_PlanList" ChildrenAsTriggers="true">
                <ContentTemplate>
                    <cc2:TabContainer ID="tbc_DJPlan" runat="server" ActiveTabIndex="0" Width="100%"
                        OnClientActiveTabChanged="activeTabChanged" OnActiveTabChanged="Tabs_ActiveTabChanged">
                        <cc2:TabPanel ID="tbp_PlanList" runat="server" TabIndex="0" HeaderText="计划列表">
                            <ContentTemplate>
                                <uc1:UCGrid ID="uc_DJPlanGridView" runat="server" />
                            </ContentTemplate>
                        </cc2:TabPanel>
                        <cc2:TabPanel ID="tbp_PlanStat" runat="server" TabIndex="1" HeaderText="统计列表">
                            <ContentTemplate>
                                <uc1:UCGrid ID="uc_DJPlanStatGridView" AllowPaging="false" SelectBoxType="None" runat="server" />
                            </ContentTemplate>
                        </cc2:TabPanel>
                    </cc2:TabContainer>
                </ContentTemplate>
                <Triggers>
                    <asp:AsyncPostBackTrigger ControlID="tbc_DJPlan" EventName="ActiveTabChanged" />
                </Triggers>
            </asp:UpdatePanel>
        </div> --------------------编程问答-------------------- 代码如上 --------------------编程问答-------------------- 自己顶

补充：.NET技术 ,  ASP.NET