API Error code 191 [duplicate]

Possible Duplicate:

Facebook API error 191

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API Error Code: 191

API Error Description: The specified URL is not owned by the application Error Message: redirect_uri is not owned by the application.

What's wrong?

When you register for an application at Facebook you must provide the domain which would be using this application.

So if you have created an application which says "abc.com" then that application can only be called "abc.com". So when you try calling your application from "xyz.com" it gets rejected with the mentioned error.