Incorrect server name for Kerberos authentication

This exception failure indicates that the server host name specified for the module configuration is incorrect, or that the server is not accessible through the network. Validate the server name and that the server can be contacted through the network.

amAuth:06/24/2011 05:48:57:828 PM CDT: Thread[http-8443-2,5,main]
LOGINFAILED Error....
amAuth:06/24/2011 05:48:57:828 PM CDT: Thread[http-8443-2,5,main]
Exception :
com.sun.identity.authentication.spi.AuthLoginException(1):null
com.sun.identity.authentication.spi.AuthLoginException(2):Service authentication failed.
javax.security.auth.login.LoginException(3):Receive timed out
javax.security.auth.login.LoginException: Receive timed out
	at com.sun.security.auth.module.Krb5LoginModule.attemptAuthentication(Krb5LoginModule.java:700)
	at com.sun.security.auth.module.Krb5LoginModule.login(Krb5LoginModule.java:542)