We want to limit the upload filesize. We created a test project using samples on the telerikwebsite. When maximum filesize is reached an error is thrown. What am i doing wrong? Below the code:
ASPX
<telerik:RadScriptManager ID="RadScriptManager1" runat="server">    <Scripts>        <%--Needed for JavaScript IntelliSense in VS2010--%>        <%--For VS2008 replace RadScriptManager with ScriptManager--%>        <asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.Core.js" />        <asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.jQuery.js" />        <asp:ScriptReference Assembly="Telerik.Web.UI" Name="Telerik.Web.UI.Common.jQueryInclude.js" />    </Scripts></telerik:RadScriptManager><script type="text/javascript">    function checkUploadedFilesSize(progressArea, args) {        alert("ok");        //progressArea.confirmed is a custom variable,            // you can use another if you want to            if (!progressArea.confirmed &&        args.get_progressData().RadUpload.RequestSize > 1000000) {            if (confirm("The total size of the selected files" +                      " is more than the limit." +                                        " Do you want to cancel the upload?")) {                progressArea.cancelRequest();            }            else {                progressArea.confirmed = "confirmed";            }        }    }</script><telerik:RadUpload runat="server" id="RadUpload1" /><telerik:RadProgressArea runat="server" id="RadProgressArea1"  OnClientProgressUpdating="checkUploadedFilesSize" /><telerik:RadProgressManager runat="server" id="RadProgressManager1" /><asp:Button runat="server" id="Button1" text="Upload" />CS
protected void RadUpload1_FileExists(object sender, UploadedFileEventArgs e){    UploadedFile file = e.UploadedFile;    string targetFileName = Server.MapPath(RadUpload1.TargetFolder) + RadUpload1.UploadedFiles[0].GetName();    file.SaveAs(Server.MapPath(@"Upload" + @"\" + targetFileName));}
web.config
<?xml version="1.0"?><configuration>    <appSettings>        <add key="Telerik.ScriptManager.TelerikCdn" value="Disabled"/>        <add key="Telerik.StyleSheetManager.TelerikCdn" value="Disabled"/>    </appSettings>    <system.web>        <compilation debug="true" targetFramework="4.0"/>        <pages>            <controls>                <add tagPrefix="telerik" namespace="Telerik.Web.UI" assembly="Telerik.Web.UI"/>            </controls>        </pages>        <httpHandlers>            <add path="ChartImage.axd" type="Telerik.Web.UI.ChartHttpHandler" verb="*" validate="false"/>            <add path="Telerik.Web.UI.SpellCheckHandler.axd" type="Telerik.Web.UI.SpellCheckHandler" verb="*" validate="false"/>            <add path="Telerik.Web.UI.DialogHandler.aspx" type="Telerik.Web.UI.DialogHandler" verb="*" validate="false"/>            <add path="Telerik.RadUploadProgressHandler.ashx" type="Telerik.Web.UI.RadUploadProgressHandler" verb="*" validate="false"/>            <add path="Telerik.Web.UI.WebResource.axd" type="Telerik.Web.UI.WebResource" verb="*" validate="false"/>        </httpHandlers>        <httpModules>            <add name="RadUploadModule" type="Telerik.Web.UI.RadUploadHttpModule"/>            <add name="RadCompression" type="Telerik.Web.UI.RadCompression"/>        </httpModules>    </system.web>    <system.webServer>        <validation validateIntegratedModeConfiguration="false"/>        <modules runAllManagedModulesForAllRequests="true">            <remove name="RadUploadModule"/>            <add name="RadUploadModule" type="Telerik.Web.UI.RadUploadHttpModule" preCondition="integratedMode"/>            <remove name="RadCompression"/>            <add name="RadCompression" type="Telerik.Web.UI.RadCompression" preCondition="integratedMode"/>        </modules>        <handlers>            <remove name="ChartImage_axd"/>            <add name="ChartImage_axd" path="ChartImage.axd" type="Telerik.Web.UI.ChartHttpHandler" verb="*" preCondition="integratedMode"/>            <remove name="Telerik_Web_UI_SpellCheckHandler_axd"/>            <add name="Telerik_Web_UI_SpellCheckHandler_axd" path="Telerik.Web.UI.SpellCheckHandler.axd" type="Telerik.Web.UI.SpellCheckHandler" verb="*" preCondition="integratedMode"/>            <remove name="Telerik_Web_UI_DialogHandler_aspx"/>            <add name="Telerik_Web_UI_DialogHandler_aspx" path="Telerik.Web.UI.DialogHandler.aspx" type="Telerik.Web.UI.DialogHandler" verb="*" preCondition="integratedMode"/>            <remove name="Telerik_RadUploadProgressHandler_ashx"/>            <add name="Telerik_RadUploadProgressHandler_ashx" path="Telerik.RadUploadProgressHandler.ashx" type="Telerik.Web.UI.RadUploadProgressHandler" verb="*" preCondition="integratedMode"/>            <remove name="Telerik_Web_UI_WebResource_axd"/>            <add name="Telerik_Web_UI_WebResource_axd" path="Telerik.Web.UI.WebResource.axd" type="Telerik.Web.UI.WebResource" verb="*" preCondition="integratedMode"/>        </handlers>    </system.webServer></configuration>