127.0.0.1 is down after apache2 install

I have problem connecting to my localhost or 127.0.0.1 after apache install i never saw the greetig page "It works !!"
here is my /etc/hosts:
****
127.0.0.1 localhost.localdomain localhost pyro-laptop
127.0.1.1 pyro-laptop

# The following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
ff02::3 ip6-allhosts
****
netstat -naplt:
*****
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 127.0.0.1:3306 0.0.0.0:* LISTEN -
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN -
tcp 0 0 192.168.1.2:46118 80.157.151.43:80 TIME_WAIT -
tcp 0 0 192.168.1.2:35475 62.41.7.58:80 ESTABLISHED 4068/firefox
tcp 0 0 192.168.1.2:34370 69.63.176.198:80 ESTABLISHED 4068/firefox
tcp 0 0 192.168.1.2:35270 62.41.7.59:80 TIME_WAIT -
tcp 0 0 192.168.1.2:50348 194.221.64.58:80 TIME_WAIT -
tcp 0 0 192.168.1.2:35268 62.41.7.59:80 ESTABLISHED 4068/firefox
*****

sudo lsof -i :80:
*****
firefox 4068 pyro 53u IPv4 44242 TCP pyro-laptop.local:35475->static-ip-62-41.eurorings.net:www (ESTABLISHED)
apache2 7368 root 3u IPv4 35132 TCP *:www (LISTEN)
apache2 7373 www-data 3u IPv4 35132 TCP *:www (LISTEN)
apache2 7375 www-data 3u IPv4 35132 TCP *:www (LISTEN)
******

$sudo lsof -i @0.0.0.0:80:
COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME
firefox 4068 pyro 22u IPv4 45692 TCP pyro-laptop.local:50084->channel38.01.05.sf2p.facebook.com:www (ESTABLISHED)
apache2 7368 root 3u IPv4 35132 TCP *:www (LISTEN)
apache2 7373 www-data 3u IPv4 35132 TCP *:www (LISTEN)
apache2 7375 www-data 3u IPv4 35132 TCP *:www (LISTEN)

$nmap 127.0.0.1

Starting Nmap 4.76 ( http://nmap.org ) at 2009-10-09 16:23 CET
Note: Host seems down. If it is really up, but blocking our ping probes, try -PN
Nmap done: 1 IP address (0 hosts up) scanned in 2.05 seconds

$sudo netstat -ntlp | grep :80
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 7368/apache2

on my apache2 configuration i have the lines
ServerName localhost
Listen 80

please can anyone help me please i'm stuck !!