NMAP - strange output :S
hi everyone;I have a problem with this command, It is showing a strange output where all ports are closed

[root@server root]# nmap -p 1-65535 localhost
Starting nmap V. 3.00 ( www.insecure.org/nmap/ )
All 65535 scanned ports on server (127.0.0.1) are: closed
Nmap run completed -- 1 IP address (1 host up) scanned in 52 seconds
As you can see this is impossible cause' I'm connected to ssh and apache is running to...
If I run "nmap" to look in a particular port as 80, it shows:
[root@server root]# nmap -p 80 localhost
Starting nmap V. 3.00 ( www.insecure.org/nmap/ )
Interesting ports on server (127.0.0.1):
Port State Service
Unable to find nmap-services! Resorting to /etc/services
80/tcp open http
Nmap run completed -- 1 IP address (1 host up) scanned in 1 second
This sistem is running "Fedora Core release 2 (Tettnang)" with all last updates installed. I run rkhunter to see if binary is corrupted, but its not...
Any idea?
Thanks for your help;
Luciano Tourreilles.