You need to provide more information about your problem.

Is the thank you button not shown in the posts pages? - If thats the Problem you need to enable the thank function in the Host Settings -> Features -> "Allow Users to Thank Posts"

Or did nothing happen when you click on the Button? If thats the case please take a look at The Event Log if there are any errors listed.

And also please tell us Which Yaf Version did you use?

http://tbz.vn  version 1.9.6 RC1 (29.1.2012). "Thanks Button" in their forum is still displayed on each article, but when clicking on the show appear in a new window error messages like this:

I'm not good at the source code so please point me in a most obvious way. Many thanks.

There are lots of javascript errors on your page

"Uncaught Error: ASP.NET Ajax client-side framework failed to load."

... ScriptResource.axd 404 (Not Found)

I would guess your web.confog is missing the important handlers like

<httpHandlers>
			<remove verb="*" path="*.asmx" />
			<add verb="*" path="*.asmx" validate="false" type="System.Web.Script.Services.ScriptHandlerFactory, System.Web.Extensions, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
			<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" />
			<add verb="GET,HEAD" path="ScriptResource.axd" type="System.Web.Handlers.ScriptResourceHandler, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" validate="false" />
			<add verb="GET" path="Resource.ashx" type="YAF.YafResourceHandler, YAF" />
		</httpHandlers>
		<httpModules>
			<add name="ScriptModule" type="System.Web.Handlers.ScriptModule, System.Web.Extensions, Version=3.5.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" />
			<add name="YafTaskModule" type="YAF.Core.YafTaskModule, YAF.Core" />
			<add name="UrlRewriter" type="Intelligencia.UrlRewriter.RewriterHttpModule,Intelligencia.UrlRewriter" />
		</httpModules>

I can still see the same Errors. Can you post the whole web.config?

Well the web.config looks correct. So far i have no more ideas this issue is out of my scope its definitely not a YAF problem, it is a IIS Server Problem.

After Search on Google.com for the "Uncaught Error: ASP.NET Ajax client-side framework failed to load." error, the most common solution would be to repair the .NET Framework on the Server (Which of course you can only do when you have full access to the server). But of course it could be a different problem.

My server runs a series of forums 123nhanh.vn YAF same version as such. So I do not think there is anything, that happens to my server. I still hope to have a clear opinion to help me fix the error. Thank.

If that's the case, then you need to go through the configurations of those other sites that are working and look for differences between them and the site that is not working -- difference in YAF version, missing files, and so on. If there are sites on the server that are working properly and this one isn't - then there is a configuration issue on this site or missing/misplaced files that is causing your problem --

The most recent and current now, sometimes my forum takes too much time to access and as a result returns a 324 error. This error occurs very often, I have contacted the supplier side my server, and they do not really have any plan treatment.

Maybe I have to reinstall the entire forum.

This forum is a page size of world football betting, gambling usually have addictive nature.