[Samba] wbinfo joined the domain but -t is in error

[arno]

Hello,
Still having some problem about the joined domain of 
wbinfo.
bash-3.00# net join -w d-ci3 -U d-bi1\\admin
Password:

Joined domain D-CI3.
bash-3.00# wbinfo -t
checking the trust secret via RPC calls failed
error code was  (0x0)
Could not check secret


it's running on samba 3.0.20 and Solaris 8

any clue ? why

here is the config:
[global]
         workgroup = D-CI3
         server string = squid proxy %v
         security = DOMAIN
         password server = 10.17.12.56 10.17.12.57
         log level = 1
         wins server = 10.17.12.9, 10.17.17.8
         idmap uid = 10000-20000
         idmap gid = 10000-20000
        winbind use default domain = Yes

thanks for any help

regards,
arno