laravel + php + apache + win7

error :

 Access to XMLHttpRequest at 'http://api.demo.com' from origin 'http://demo.com' has been blocked by CORS policy: Request header field pragma is not allowed by Access-Control-Allow-Headers in preflight response.

apache de configuración:

 <VirtualHost *:80> DocumentRoot "G:/xampp/htdocs/demo/public" ServerName api.demo.com Header always set Access-Control-Allow-Origin "*" Header always add Access-Control-Allow-Methods "GET, POST" Header always set Access-Control-Allow-Headers "Origin,XMLHttpRequest, X-Requested-With, Content-Type, Authorization,X-Custom-Header" Header always set Access-Control-Allow-Credentials "true" </VirtualHost>

pero todavía comete errores. ¿Por qué?