or
i download the web mail demo source code, and create new application with help of downloaded file in my local system (Visual studio 3.5 SP1, SQL 2008). When i built the application, i received the "unrecongnized attribute 'targetFramework'.Note that attribute names are case-sensitive". Then, I found that your product(Web Mail) supports Framework 4.o. Now i changed to framework version to 4.0.
But the error keeps coming up all the time.
Need help on this.
Thanks in advance,

<httpHandlers> <add path="Telerik.Web.UI.WebResource.axd" type="Telerik.Web.UI.WebResource" verb="*" validate="false"/> <add path="Telerik.Web.UI.SpellCheckHandler.axd" type="Telerik.Web.UI.SpellCheckHandler" verb="*" validate="false" /> </httpHandlers>
<handlers> <add name="Telerik_Web_UI_WebResource_axd" verb="*" preCondition="integratedMode" path="Telerik.Web.UI.WebResource.axd" type="Telerik.Web.UI.WebResource"/> <add name="Telerik.Web.UI.SpellCheckHandler" path="Telerik.Web.UI.SpellCheckHandler.axd" type="Telerik.Web.UI.SpellCheckHandler" verb="*" /> </handlers>
<telerik:RadEditor ID="reEditor" runat="server" SkinID="DefaultSetOfTools" Height="400px" Width="100%" ContentAreaCssFile="~/App_Themes/_generic/RadEditorContent.css"> <Languages> <telerik:SpellCheckerLanguage Code="nl-NL" Title="nl-NL" /> </Languages> <Content></Content> </telerik:RadEditor>

$("#<%=chkRoundSale.ClientID%>").change(function() { var thisCheck = $(this); if (thisCheck.is(':checked')) { $("#<%= gvEnqMixes.ClientID%> tr").each(function() { var tr = this; var cells = tr.cells; var len = $('td', this).length var txt = $(this).find("td:eq(7)").html(); $(this).find("td:eq(7)").html(Math.round(txt)); }); } else { $("#<%=gvEnqMixes.ClientID%> tr").each(function() { var tr = this; var cells = tr.cells; var len = $('td', this).length var txt = $(this).find('input:submit[id$=RefreshButton]'); txt.click() }); } });int count = RadTabStrip1.Tabs.Count();if (count > 0) { for (int i = 0; i < count;i++ ) { RadTabStrip1.Tabs.RemoveAt(i); } }