I've wrote a Android in App in which I want to Integrate a Chat via XMPP. I've logged in Facebook with permission for XMPPLogin. But when I want to login in Facebook from XMPP I receive this XML Response:

RCV  (1095775528): <failure xmlns='urn:ietf:params:xml:ns:xmpp-sasl'><not-authorized/></failure></stream:stream>

causing this Error:

SASL authentication failed using mechanism X-FACEBOOK-PLATFORM: 
at org.jivesoftware.smack.SASLAuthentication.authenticate(SASLAuthentication.java:341)
at org.jivesoftware.smack.XMPPConnection.login(XMPPConnection.java:242)