DateTimePicker control install error
<p>I have a question about a third-party DateTimePicker control.
I've downloaded the dll and paste the appropriate web.config lines.
I've put the control into the aspx page. When I load the page an alertbox appears:</p>

<blockquote>
  <p>No «add verb="GET" path="/JavascriptDateTimeFormat.axd" /» httpHandler.</p>
</blockquote>

<p>The control's textbox and the buttons are present but does nothing.</p>

<p>Part of my web.config is:</p>

<pre><code>&lt;pages&gt;
  &lt;controls&gt;
    &lt;add tagPrefix="asp" namespace="System.Web.UI" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /&gt;
    &lt;add tagPrefix="asp" namespace="System.Web.UI.WebControls" assembly="System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /&gt;
    &lt;add tagPrefix="mark" assembly="Mark.Web.UI.WebControls.DateTimePicker" namespace="Mark.Web.UI.WebControls"/&gt;
  &lt;/controls&gt;
&lt;/pages&gt;
&lt;httpHandlers&gt;
  &lt;remove verb="*" path="*.asmx" /&gt;
  &lt;add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /&gt;
  &lt;add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /&gt;
  &lt;add verb="GET,HEAD" path="ScriptResource.axd" validate="false" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /&gt;
  &lt;add verb="GET" path="/helpdeskweb/JavascriptDateTimeFormat.axd" type="Mark.Web.UI.JavascriptDateTimeFormat, Mark.Web.UI.WebControls.DateTimePicker"/&gt;
&lt;/httpHandlers&gt;
</code></pre>

<p>What should I do?</p>
