samba - Mar 2009 - wbinfo -t produces NT_STATUS_INVALID_HANDLE

hi there,

on my linux box, with samba 3.2.6 wbinfo -t produces the following output:

wbinfo -t
checking the trust secret via RPC calls failed
error code was NT_STATUS_INVALID_HANDLE (0xc0000008)
Could not check secret

what could be the reason?
globals from my smb.conf is attached

thanks for your help
robert

[global]
    workgroup = rotti
	security = user
	add machine script = /usr/sbin/useradd  -c Machine -d /var/lib/nobody -s
/bin/false %m$
	domain logons = No
	domain master = No
	netbios name = chrissy
	passdb backend = smbpasswd
    ;;;
    ;;; Options for winbind
    ;;;
	winbind uid = 20000-30000
	winbind gid = 20000-30000
	winbind use default domain = yes

	log level = 3
	idmap gid = 20000-30000
	idmap uid = 20000-30000
	usershare allow guests = No
        wins server = 10.168.1.102
        password server = 10.168.1.102