qmail & smtpauth big problem

hello
i have problem with qmail & smtpauth

when i made test:
/var/qmail/bin/qmail-popup bldsdsdsdsd /bin/checkpassword id
it's ok but when i type:

telnet localhost 110 , user, pass

it's :
-ERR authorization failed
Connection closed by foreign host.

my configuration:
qmail smtp.auth, checkpasworda, uscpi i starting qmail via tcpserver:

#auth smtp
/usr/local/bin/tcpserver -u506 -g1505 0 smtp /var/qmail/bin/qmail-smtpd
test.mikolow.net /bin/checkpassword /bin/true &
echo 'pop3'
/usr/local/bin/tcpserver -RH -u506 -g1505 0 pop3 /var/qmail/bin/qmail-popup
qmail-popup test.mikolow.net /bin/checkpassword /var/qmail/bin/qmail-pop3d
Maildir &

ls -l /bin/checkpassword
-rwxrwxrwt 1 root root 7588 sty 10 17:03 /bin/checkpassword


please help

--
best regards
popo