Thanks everybody.
I studied the following url
http://support.microsoft.com/default.aspx?scid=kb;en-us;Q271071
and check with Windows Server 2012, I wonder what's difference between IIS_USRS and IUS ...
I tried to make full control to IIS_IUSRS for wwwroot and demo which is test for smarty and then restart IIS, and browsing http://localhost/demo/index.php but the same error message displayed.
So I ...
Can anyone tell me how to solve this problem ?
Fatal error: Uncaught --> Smarty: unable to write file .\templates_c\wrt52dde9fe9c8358.95452229 <-- thrown in C:\inetpub\wwwroot\libs\sysplugins\s ...