To Do Properly Work AJAX with Asp.net 2005

Download ASPAJAXSETUP 2.0 over Net and install it.
Add a  tab on Toolbar by  the name Ajax Extender.
Right Click on your Toolbar and click on Choose Items. Select Update Panel, Script Manager, Update Progress.

In Web.Config Add Following........

<httpHandlers>
            <remove verb="*" path="*.asmx"/>
            <add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
            <add verb="*" path="*_AppService.axd" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
           <add verb="GET,HEAD" path="ScriptResource.axd" validate="false" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=1.0.61025.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>
</httpHandlers>
           
<runtime>
       <assemblyBinding xmlns="urn:schemas-microsoft-com:asm.v1">
            <dependentAssembly>
                <assemblyIdentity name="System.Web.Extensions" publicKeyToken="31BF3856AD364E35"/>
                <bindingRedirect oldVersion="3.5.0.0" newVersion="1.0.61025.0"/>
            </dependentAssembly>
            <dependentAssembly>
                <assemblyIdentity name="System.Web.Extensions.Design" publicKeyToken="31BF3856AD364E35"/>
                <bindingRedirect oldVersion="3.5.0.0" newVersion="1.0.61025.0"/>
            </dependentAssembly>
        </assemblyBinding>
    </runtime>         
Now get enjoy with AJAX................