Silverlight toolkit greyed out

Hi guys
I'm trying to enable silverlight to a asp.net website. However, my silverlight toolbox is greyed out in my asp.net website. I downloaded the silverlight 4.0 toolbox from here:http://silverlight.codeplex.com/
I downloaded the april 2010 version. Then tried to add it to my toolbox and it won't add. I do not see any System.Web.Silverlight refrence anywhere.

Now I can run my silverlight app in my asp.net website. If I add my .axp file to the ClientBin directory, then add the silverlight.js file to the website project.

In my aspx file I add this:

Code:

---

<div id="silverlightControlHost" style="width:100%; height:100%;" >
        <object data="data:application/x-silverlight-2,"
            type="application/x-silverlight-2" width="50%" style="height: 500px;"
            height="100%">
                  <param name="source" value="ClientBin/clock.xap"/>
                  <param name="onError" value="onSilverlightError" />
                  <param name="background" value="white" />
                  <param name="minRuntimeVersion" value="4.0.50826.0" />
                  <param name="autoUpgrade" value="true" />
                  <a href="http://go.microsoft.com/fwlink/?LinkID=149156&v=4.0.50826.0" style="text-decoration:none">
                          <img src="http://go.microsoft.com/fwlink/?LinkId=161376" alt="Get Microsoft Silverlight" style="border-style:none"/>
                  </a>
            </object>
        <%--<iframe id="_sl_historyFrame" style="visibility:hidden;height:100%;width:100%;border:0px"></iframe>--%>
    </div>

---

It still works. However, I can't use the <asp:Silverlight> control. When I try to add this to my aspx file I get an error.

<%@ Register Assembly="System.Web.Silverlight"
Namespace="System.Web.UI.SilverlightControls"
TagPrefix="asp" %>

Anyone have any ideas on why this is the way it is and how can I get teh <asp:silverlight> control? thanks.

The <asp:Silverlight /> control was deprecated with the release of Silverlight 3. The method you're using above is the correct way to add Silverlight to a page.

oh thanks.