splunk for facebook app error "Access denied"

Hi, after placing the app in the directory, I tried to make it work with the Facebook login. It creates the app in facebook and apparently authorize the app but after thata I always get a blank screen with an error in the page.

The error type is: Access denied

And the address it's trying to open is: http://splunkforfacebookapp.3owl.com/status/?redirect=http%3A%2F%2Fusmi1155%3A8000%2Fstatic%2Fapp%2Fsplunk_facebook%2Fstatus.html%3Fsplunkoriginurl%3D%2Fit-IT%2Fapp%2Fsplunk_facebook%2Fhome#access_token=XXXXXXXXXXXXXXXXX&expires_in=0

[I replaced the token with XXXX ...]

Any idea about what's happening?

Thanks, Massimo