ok
i have setup FB app and entered Api and secret in facebook connect config page.
It worked only one time
now, when i try it give me always this screen.
what do i need to do to fix?
(this is translation):
The URL is not allowed by the configuration of the application .: One or more of the URLs are not permitted by the settings of the app. The URL must match the website or canvas URL, or domain should be a subdomain of one of the domains of the app.