401.2 on RadChart

[Cloud]

I have a page which contains some search parameters and a telerik chart.
At the beginning, the page can be rendered because the chart is invisible, once i click the generate chart button, it run for a long time and finally prompt for username and password, after entering 3 times, it shows me the 401.2 error.

The web application is using 2008 Q3 on IIS 6.

Here is part of my web.config

<location path="Telerik.Web.UI.WebResource.axd">
        <system.web>
            <authorization>
                <allow users="*"/>
            </authorization>
        </system.web>
    </location>
    <location path="ChartImage.axd">
        <system.web>
            <authorization>
                <allow users="*"/>
            </authorization>
        </system.web>
    </location>

         .......

<httpHandlers>
            <remove path="*.asmx" verb="*"/>
            <add path="*.asmx" verb="*" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false"/>
            <add path="*_AppService.axd" verb="*" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false"/>
            <add path="ScriptResource.axd" verb="GET,HEAD" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35" validate="false"/>
            <add path="Telerik.RadUploadProgressHandler.ashx" verb="*" type="Telerik.Web.UI.Upload.RadUploadProgressHandler, Telerik.Web.UI"/>
            <add path="Telerik.Web.UI.DialogHandler.aspx" verb="*" type="Telerik.Web.UI.DialogHandler, Telerik.Web.UI, Culture=neutral, PublicKeyToken=121fae78165ba3d4"/>
            <add path="Telerik.Web.UI.SpellCheckHandler.axd" verb="*" type="Telerik.Web.UI.SpellCheckHandler, Telerik.Web.UI, Culture=neutral, PublicKeyToken=121fae78165ba3d4"/>
            <add path="ChartImage.axd" verb="*" type="Telerik.Web.UI.ChartHttpHandler, Telerik.Web.UI, Culture=neutral, PublicKeyToken=121fae78165ba3d4" validate="false"/>
            <add path="Telerik.Web.UI.WebResource.axd" verb="*" type="Telerik.Web.UI.WebResource, Telerik.Web.UI" validate="false"/>
        </httpHandlers>

[Cloud]

Additional information, this application is only enabled for window integrated security, annoymous login is not allowed.

I have also tried to set allowusers="?", this doesn't work as well.

[Vladimir Milev]

Hello Cloud,

Are you by any chance using "UseSession=false" in that particular chart?

Kind regards,
Vladimir Milev
the Telerik team

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