SASL EXternal Login with smack

Hey Team,

I am trying to login with the EXTERNAL login schemen in smack but i am getting following error any clue?

org.jivesoftware.smack.sasl.SASLErrorException: SASLError using EXTERNAL: account-disabled
at org.jivesoftware.smack.SASLAuthentication.authenticationFailed(SASLAuthentication.java:292)
at org.jivesoftware.smack.tcp.XMPPTCPConnection$PacketReader.parsePackets(XMPPTCPConnection.java:1093)
at org.jivesoftware.smack.tcp.XMPPTCPConnection$PacketReader.access$300(XMPPTCPConnection.java:993)
at org.jivesoftware.smack.tcp.XMPPTCPConnection$PacketReader$1.run(XMPPTCPConnection.java:1009)
at java.lang.Thread.run(Thread.java:748)

Thanks,
Hiren Vavadiya