Delegation looks ok:
host -t ns osiriscomplex.net
osiriscomplex.net name server cb-217-129-173-164.netvisao.pt.
But trying to retrieve records from your NS doesn't work:
host -t ns osiriscomplex.net 188.8.131.52
;; connection timed out; no servers could be reached
It would appear that there's no name server running at 184.108.40.206:
Starting nmap 3.55 ( http://www.insecure.org/nmap/
) at 2006-03-13 19:59 EST
Note: Host seems down. If it is really up, but blocking our ping probes, try -P0
Nmap run completed -- 1 IP address (0 hosts up) scanned in 12.084 seconds
Got port 53 open and name server running running on that machine?