Please send all messages to the jcifs mailing list. Lawrence A. Weber said: > Have you actually tried to authenticate against an XP > SP2 machine? $ cp examples/Logon.java . $ javac Logon.java $ java Logon 122.22.195.21 "MYXPMACH;Alice:thepass" works fine but MYXPMACH is actually not Sp2 it's Sp1. Mike