Urgent: model popup not working with radgrid and radajax manager

Hi jayesh ,

       my modal popup not working in telerik rad grid

<telerik:RadGrid ID="grid_employee" AllowMultiRowSelection="True" runat="server"
        AllowFilteringByColumn="true" GridLines="None" CellSpacing="1" CssClass="RadGrid_WebBlue"
        Width="100%" Skin="Office2010Silver" AllowPaging="true" PageSize="50" >
        <ClientSettings EnableRowHoverStyle="true">
            <Selecting AllowRowSelect="false" />
        </ClientSettings>
        <GroupingSettings CaseSensitive="false" />
        <MasterTableView AutoGenerateColumns="false" DataKeyNames="employee_id" Summary="RadGrid table">
            <Columns>

 <telerik:GridTemplateColumn HeaderText="Action" ItemStyle-HorizontalAlign="Center"
                    HeaderStyle-Width="10%" AllowFiltering="false" HeaderStyle-HorizontalAlign="Center"
                    ItemStyle-Width="10%">
                    <ItemTemplate>
                        <asp:ImageButton ID="imgview" runat="server" ImageUrl="../images/view.png" CssClass="gridicons"
                            ToolTip="View" CommandName="imgview" />
                        <asp:ImageButton ID="imgedit" runat="server" ImageUrl="../images/edit.png" CssClass="gridicons"
                            ToolTip="Edit" />
                        <asp:ImageButton ID="imgdelete" runat="server" ImageUrl="../images/delete.png" CssClass="gridicons"
                            ToolTip="Delete" />
                    </ItemTemplate>
                </telerik:GridTemplateColumn>

/Columns>
        </MasterTableView>
        <PagerStyle AlwaysVisible="true" Mode="NextPrevAndNumeric" />
    </telerik:RadGrid>

<asp:Button ID="Button1" runat="server" Text="Button" Style="display: none;" />
    <cc1:ModalPopupExtender ID="popup_viewemployee" runat="server" CancelControlID="btnback"
        TargetControlID="Button5" PopupControlID="pnlemployeeview" PopupDragHandleControlID="PopupHeader"
        Drag="true" BackgroundCssClass="bgdim">
    </cc1:ModalPopupExtender>
    <asp:Panel ID="pnlemployeeview" Width="60%" Style="display: none; background-color: ButtonFace;"
        runat="server">
        <div style="width: 100%; border: solid 1px #92c7d6;">
            <div style="width: 100%;" class="body">
                <table>
                    <tr>
                        <td>
                            <asp:Label ID="Label2" runat="server" CssClass="labelpopup" Text="View Employee"></asp:Label>
                        </td>
                    </tr>
                </table>
            </div>
            <div>
                <table cellpadding="3" cellspacing="3" width="100%">
                    <tr>
                        <td width="15%">
                            <asp:Label ID="Label3" runat="server" Text="First Name"></asp:Label>
                        </td>
                        <td width="35%">
                            <asp:Label ID="lbl_firstname" runat="server" CssClass="label"></asp:Label>                            
                        </td>
                        <td width="10%">
                            <asp:Label ID="Label4" runat="server" Text="Last Name"></asp:Label>
                        </td>
                        <td width="35%">
                            <asp:Label ID="lbl_lastname" runat="server" CssClass="label"></asp:Label>   
                        </td>
                    </tr>
                    <tr>
                        <td width="15%">
                            <asp:Label ID="Label5" runat="server" Text="Employee Code"></asp:Label>
                        </td>
                        <td width="35%">
                            <asp:Label ID="lbl_employeecode" runat="server" CssClass="label"></asp:Label>   
                        </td>
                        <td width="10%">
                            <asp:Label ID="Label6" runat="server" Text="Password"></asp:Label>
                        </td>
                        <td width="35%">
                            <asp:Label ID="lbl_password" runat="server" CssClass="label"></asp:Label>   
                        </td>
                    </tr>
                    <tr>
                        <td>
                            <asp:Label ID="Label7" runat="server" Text="Contact No"></asp:Label>
                        </td>
                        <td>
                            <asp:Label ID="lbl_contactno" runat="server" CssClass="label"></asp:Label>   
                        </td>
                        <td>
                            <asp:Label ID="Label8" runat="server" Text="Emai ID"></asp:Label>
                        </td>
                        <td colspan="3">
                            <asp:Label ID="lbl_emailid" runat="server" CssClass="label"></asp:Label>   
                        </td>
                    </tr>
                    <tr>
                        <td>
                            <asp:Label ID="Label9" runat="server" Text="Address"></asp:Label>
                        </td>
                        <td colspan="3">
                            <asp:TextBox ID="lbl_address" runat="server" CssClass="textbox" TextMode="MultiLine"
                                Rows="3" Width="95%" Enabled="false"></asp:TextBox>
                        </td>
                    </tr>
                    <tr>
                        <td>
                            <asp:Label ID="Label10" runat="server" Text="Remarks"></asp:Label>
                        </td>
                        <td colspan="3">
                            <asp:TextBox ID="TextBox8" runat="server" CssClass="textbox" MaxLength="254"
                                TextMode="MultiLine" Rows="3" Width="95%" Enabled="false"></asp:TextBox>
                        </td>
                    </tr>
                </table>
            </div>
            <br />
            <div style="width: 95%;">
                <table width="100%" cellpadding="5" cellspacing="5">
                    <tr>
                        <td align="center">                            
                            <asp:LinkButton ID="LinkButton2" runat="server" CssClass="button" Text="Back"></asp:LinkButton>
                        </td>
                    </tr>
                </table>
            </div>
        </div>
    </asp:Panel>

protected void grid_employee_ItemCommand(object source, GridCommandEventArgs e)
        {
            if (e.CommandName == "imgview")
            {
                GridDataItem item = grid_employee.MasterTableView.Items[e.Item.ItemIndex];
                this.popup_viewemployee.Show();
            }
        }