Error while using Ajax Tabs control

When i access that form in fire fox version 7.0 then these tabs does not show and that form is working perfect in all other browsers. please solve that issue. Thanks in advance. Below is my code. <form id="frmNewsManagement" runat="server" enctype="multipart/form-data"> <cc1:ToolkitScriptManager ID="ScriptManager1" runat="server"> </cc1:ToolkitScriptManager> <asp:UpdatePanel ID="UDPMain" runat="server"> <ContentTemplate> <div style="margin-left: 10px; margin-right: 10px;">

<cc1:TabContainer ID="TabContainer1" runat="server"> <cc1:TabPanel ID="tbpnlNewsManagement" runat="server"> <HeaderTemplate> News Management </HeaderTemplate> <ContentTemplate> <asp:UpdatePanel ID="UDPfirst" ChildrenAsTriggers="true" runat="server" UpdateMode="Conditional"> <ContentTemplate> <table class="FormTable"> <tr> <td align="left" style="width: 50px"> <asp:Label ID="lblSelect" runat="server" Text="Select" SkinID="Label"></asp:Label> </td> <td> <asp:DropDownList ID="cmbStatuses" runat="server" SkinID="DropDownList" OnSelectedIndexChanged="ddlSelect_SelectedIndexChanged" AutoPostBack="true"> <asp:ListItem Text="Show Active" Value="0"></asp:ListItem> <asp:ListItem Text="Show Deleted" Value="1"></asp:ListItem> </asp:DropDownList> </td> </tr> </table> <asp:GridView ID="grdViewRecord" OnDataBound="grdViewRecord_DataBound" SkinID="gvwSilver" AutoGenerateColumns="False" OnRowCommand="grdViewRecord_RowCommand" runat="server" DataKeyNames="NEWSID" OnSorting="grdViewRecord_Sorting"> <Columns> <asp:BoundField HeaderText="id" DataField="NEWSID" Visible="false" /> <asp:BoundField HeaderText="News Title" ItemStyle-Wrap="true" DataField="NEWSTITLE" SortExpression="NEWSTITLE"> <HeaderStyle HorizontalAlign="Left" Font-Bold="True" /> <ItemStyle Width="200px" /> </asp:BoundField> <asp:BoundField HeaderText="Date" DataField="NEWSDATE" ItemStyle-Wrap="true" SortExpression="NEWSDATE"> <HeaderStyle HorizontalAlign="Left" Font-Bold="True" /> <ItemStyle Width="100px" /> </asp:BoundField> <asp:BoundField HeaderText="Department" ItemStyle-Wrap="true" DataField="DEPARTMENTNAME" SortExpression="DEPARTMENTNAME"> <HeaderStyle HorizontalAlign="Left" Font-Bold="True" /> <ItemStyle Width="150px" /> </asp:BoundField> <asp:BoundField HeaderText="Status" ItemStyle-Wrap="true" DataField="STATUSSHORTDESC" SortExpression="STATUSSHORTDESC"> <HeaderStyle HorizontalAlign="Left" Font-Bold="True" /> <ItemStyle Width="100px" /> </asp:BoundField> <asp:TemplateField HeaderText="Actions" HeaderStyle-HorizontalAlign="center" Visible="false"> <ItemTemplate> <center> <asp:ImageButton ID="btnEdit" ImageUrl="~/images/Icon/ico_edit.png" CommandArgument='<%# Eval("NEWSID") %>' runat="server" CommandName="EditNews" Text="Edit" ToolTip="Edit News" /> &nbsp;

<asp:ImageButton ID="btnDelete" ImageUrl="~/images/Icon/ico_delete.png" CommandArgument='<%# Eval("NEWSID") %>' runat="server" CommandName="DeleteNews" Text="Delete" ToolTip="Delete News" /> </center> </ItemTemplate> <ItemStyle Width="25px" /> </asp:TemplateField> <asp:TemplateField HeaderText="Actions" HeaderStyle-HorizontalAlign="center" ItemStyle-Width="20px" Visible="false"> <ItemTemplate> <center> <asp:ImageButton ID="btnRestore" ImageUrl="~/images/Icon/restore.png" CommandArgument='<%# Eval("NEWSID") %>' runat="server" CommandName="RestoreNews" Text="Restore" ToolTip="Restore News" /> </center> </ItemTemplate> <ItemStyle Width="25px" /> </asp:TemplateField> </Columns> <PagerTemplate> <table border="0" width="100%"> <tr> <td style="border: 0"> <asp:Label ID="lblTotalRecord" runat="server"></asp:Label> </td> <td style="float: right; border: 0"> <asp:TextBox ID="txtSearch" CssClass="totalPagesAlign" runat="server"></asp:TextBox> <asp:ImageButton ID="btnSearch" runat="server" ImageUrl="~/Images/search.png" OnCommand="btnSearch_Command" CommandArgument="Search" ToolTip="Search by news title" CommandName="Search"></asp:ImageButton> <asp:ImageButton ID="imgPageFirst" runat="server" ImageUrl="~/Images/Icon/first.gif" CommandArgument="First" ToolTip="First" CommandName="Page" OnCommand="imgPageFirst_Command"> </asp:ImageButton> <asp:ImageButton ID="imgPagePrevious" runat="server" ImageUrl="~/Images/Icon/Prev.gif" CommandArgument="Prev" ToolTip="Previous" CommandName="Page" OnCommand="imgPagePrevious_Command"> </asp:ImageButton> <span class="totalPagesAlign"> <asp:Label ID="lblRecord" runat="server"></asp:Label> <asp:Label ID="lblOf" runat="server" Text="of"></asp:Label> <asp:Label ID="lblTotalPage" runat="server"></asp:Label> </span> <asp:ImageButton ID="imgPageNext" runat="server" ImageUrl="~/Images/Icon/next.gif" CommandArgument="Next" ToolTip="Next" CommandName="Page" OnCommand="imgPageNext_Command"></asp:ImageButton> <asp:ImageButton ID="imgPageLast" runat="server" ImageUrl="~/Images/Icon/Last.gif" CommandArgument="Last" ToolTip="Last" CommandName="Page" OnCommand="imgPageLast_Command"></asp:ImageButton> <asp:ImageButton ID="btnPageSize" ToolTip="Show five records" runat="server" ImageUrl="~/Images/Icon/5.gif" OnCommand="btnPageSize_Command"> </asp:ImageButton> <asp:ImageButton ID="btnPageSize2" runat="server" ToolTip="Show ten records" ImageUrl="~/Images/Icon/10.gif" OnCommand="btnPageSize2_Command"></asp:ImageButton> <asp:ImageButton ID="btnPageSize3" runat="server" ToolTip="Show twenty records" ImageUrl="~/Images/Icon/20.gif" OnCommand="btnPageSize3_Command"></asp:ImageButton> <asp:ImageButton ID="btnPageSize4" runat="server" ToolTip="Show fifty records" ImageUrl="~/Images/Icon/50.gif" OnCommand="btnPageSize4_Command"></asp:ImageButton> </td> </tr> </table> </PagerTemplate> </asp:GridView> <asp:Label ID="lblPopupTargetID" runat="server" Style="display: none;"></asp:Label> <cc1:ModalPopupExtender ID="btnDelete_ModalPopupExtender" runat="server" PopupControlID="pnlDelete" TargetControlID="lblPopupTargetID" BackgroundCssClass="ModalPopupBG" DynamicServicePath="" Enabled="True" CancelControlID="btnDeleteCancel"> </cc1:ModalPopupExtender> <asp:Panel ID="pnlDelete" runat="server" Style="display: none;"> <div class="popup_Container"> <div class="popup_Titlebar" id="PopupHeader"> <div class="TitlebarLeft"> Delete </div> <div class="TitlebarRight" onclick="btnDelete_ModalPopupExtender.Hide()"> </div> </div> <div class="popup_Body"> Are you sure, you want to Delete the record? </div> <div> <center> <asp:Button ID="btnDeleteOK" OnClick="btnDeleteOK_Click" runat="server" SkinID="Button" Text="Ok" /> &nbsp; <asp:Button ID="btnDeleteCancel" runat="server" SkinID="Button" Text="Cancel" /> </center> <br /> </div> </div> </asp:Panel> <asp:Label ID="lblRestorePopupId" runat="server" Style="display: none;"></asp:Label> <cc1:ModalPopupExtender ID="mdpopupRestore" runat="server" PopupControlID="pnlRestore" TargetControlID="lblRestorePopupId" BackgroundCssClass="ModalPopupBG" DynamicServicePath="" Enabled="True" CancelControlID="btnRestoreCancel"> </cc1:ModalPopupExtender> <asp:Panel ID="pnlRestore" runat="server" Style="display: none;"> <div class="popup_Container"> <div class="popup_Titlebar" id="Div1"> <div class="TitlebarLeft"> Restore </div> <div class="TitlebarRight" onclick="btnDelete_ModalPopupExtender.Hide()"> </div> </div> <div class="popup_Body"> Are you sure, you want to Restore the record? </div> <div> <center> <asp:Button ID="btnRestoreOk" OnClick="btnRestoreOK_Click" runat="server" SkinID="Button" Text="Ok" /> &nbsp; <asp:Button ID="btnRestoreCancel" runat="server" SkinID="Button" Text="Cancel" /> </center> <br /> </div> </div> </asp:Panel> </ContentTemplate> <Triggers> <asp:AsyncPostBackTrigger ControlID="cmbStatuses" /> <asp:AsyncPostBackTrigger ControlID="grdViewRecord" EventName="RowCommand" /> <asp:AsyncP开发者_开发问答ostBackTrigger ControlID="btnDeleteOK" EventName="Click" /> <asp:AsyncPostBackTrigger ControlID="btnDeleteCancel" EventName="Click" /> <asp:AsyncPostBackTrigger ControlID="btnRestoreOK" EventName="Click" /> <asp:AsyncPostBackTrigger ControlID="btnRestoreCancel" EventName="Click" /> <asp:PostBackTrigger ControlID="btnReport" /> </Triggers> </asp:UpdatePanel> <hr /> <asp:Button ID="btnAdd" SkinID="button" runat="server" Text="Add New" OnClick="btnAdd_Click" /> <asp:Button ID="btnReport" runat="server" Text="Report" SkinID="ReportButton" OnClick="btnReport_Click"> </asp:Button> </ContentTemplate> </cc1:TabPanel> </cc1:TabContainer> </div> </ContentTemplate> </asp:UpdatePanel> </form>

When i access that form in fire fox version 7.0 then these tabs does not show and that form is working perfect in all other browsers. please solve that issue.