this is my 2nd topic here

!
I just installed linux & followed some tutorials to install lighttpd, php & mysql.
now I've CentOS 5.1 on VMWare with 2 connections one bridged and one host only and here are more details :
Windows XP :
Lan IP : 192.168.1.2
VMware Network Adapter VMnet1 : 192.168.71.1
CentOS :
eth0 IP : 192.168.1.12
eth1 IP : 192.168.71.128
Now, when I try to access the web server from Windows I'm getting "Connection Interrupted", but when I stop iptables, I can access fine.
BTW, all I know about iptables is how to stop / start & restart it , so please tell me exactly what steps should I do :$