asp:ScriptManager - Unknown server tag

Below are the links I followed in order to resolve 
the mistery of the error
 "UNKNOWN SERVER TAG"  -  related to asp:ScriptManager 

 

http://localhost/TestWeb/SimpleWebService.aspx

Server Error in '/TestWeb' Application.

---

Parser Error
Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.

Parser Error Message: Unknown server tag 'asp:ScriptManager'.

Source Error:
 
Version Information: Microsoft .NET Framework Version:2.0.50727.3053; ASP.NET Version:2.0.50727.3053 

Line 42: form id="Form1" runat="server" Line 43: asp:ScriptManager runat="server" ID="scriptManager" Line 44: Services Line 45:  asp:ServiceReference path="SimpleWebService.asmx"

  

Professional ASP.NET 2.0 AJAX Matt Gibbs, Dan Wahlin ISBN: 978-0-470-10962-5 Paperback 336 pages June 2007

 http://www.wrox.com/WileyCDA/WroxTitle/productCd-0470109629.html

Professional-ASP-NET-2-0-AJAX - source code DOWNLOAD  

I took the Web.Config from the chapter 4  ( or 5 ? )  and everything was OK ,
  problem solved !

 

~ ~ ~ 

Ajaxed Part II. Server Side AJAX
http://thejoyofcode.com/Ajaxed_Part_II._Server_Side_AJAX.aspx

How to set path to the scriptreference in ScriptManager

http://www.dotnetspider.com/forum/145097-how-set-path-scriptreference-ScriptManager.aspx

http://www.asp.net/ajax/videos/how-do-i-make-client-side-network-callbacks-with-aspnet-ajax

 How To Consume Web Services Using AJAX and ASP.NET 3.5

http://visualstudiomagazine.com/articles/2007/09/01/consuming-remote-web-services-with-aspnet-ajax.aspx 

A beginner’s guide for consuming a WCF service in JavaScript using ASP.NET AJAX

Using the ScriptManager

Calling Web Services from Client Script

http://msdn.microsoft.com/en-us/library/system.web.ui.scriptmanager.aspx

MicrosoftAjax.js ,ScriptPath , ScriptManager

http://damianblog.com/2006/11/27/scriptmanager-scriptpath/



  

ASP.NET Ajax :: Script Manager vs ToolkitScriptManager

http://blog.turlov.com/2008/05/scriptmanager-vs-toolkitscriptmanager.html

 

Configure Web.Config in order to use asp:ScriptManager

 

http://www.semenoff.dk/en/Code-Corner/ASP.Net.AJAX/WebService-From-JavaScript.aspx

How to call a Web Service from client-side JavaScript using ASP.Net AJAX

http://july-code.blogspot.com/2008/07/how-to-call-remote-web-services-from.html