facebook login error -

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i using code obtain login:(i put 000..0 instead app id.

<html>     <head>       <title>my facebook login page</title>     </head>     <body>       <div id="fb-root"></div>       <script src="http://connect.facebook.net/en_us/all.js"></script>       <script>          fb.init({              appid:000000000000000, cookie:true,              status:true, xfbml:true           });         </script>      <fb:login-button>      login facebook   </fb:login-button>       </body>  </html>

the problem on web browser pops facebook login page. have following error: invalid argument

given url not allowed application configuration.. why?! thx


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