[Serusers] serctl - tail problems on solaris8?

[Kamil Ince]

bet i missed reading something, again :-/
but wasting too much time on this..
i get on solaris 8 the following:

# echo $SIP_DOMAIN
myser.my.net
# echo $PW
heslo
# serctl add user1 hispw user1 at my.net
usage: tail [+/-[n][lbc][f]] [file]
       tail [+/-[n][l][r|f]] [file]
new user added
# serctl passwd user1 newpw
usage: tail [+/-[n][lbc][f]] [file]
       tail [+/-[n][l][r|f]] [file]
non-existent user

of course the user has been added to the database...
anyone came accross that before?
tia
-k