after installation:
Installation complete
Go to the main page or to the admin area

click 'admin' taken to admin pages | admin page works 100%

click 'index' take to domain.com/index | shown index page is 404


System Specs
Requirements installed
* Linux/Unix/Windows LINUX(centos)
* Apache 2 or higher (with mod_rewrite module) APACHE 2.4
* PHP 5.2.6 or higher with: PHP Version 5.2.13
o register_globalsoff
o safe_mode off
* PHP modules:
o PDO PDO drivers sqlite, mysql, sqlite2
o mbstring installed
o zip installed
o zlib installed
o ftp installed
* MySQL 5.0 or higher installed 5.0.67
* GD Library 2 with FreeType support installed (2.0.34)
* Mail server (SendMail, Exim or other) sendmail installed
* Cron avaliable


again the problem was .htaccess

OLD
Options +FollowSymLinks
RewriteEngine On
#RewriteCond %{REQUEST_FILENAME} !-f
#RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} !^/index.php
RewriteCond %{REQUEST_URI} (/|\.php|\.html|\.htm|\.feed|\.pdf|\.raw|/[^.]*)$ [NC]
RewriteRule (.*) index.php

NEW

Options +FollowSymLinks
RewriteEngine On
RewriteBase /
#RewriteCond %{REQUEST_FILENAME} !-f
#RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} !^/index.php
RewriteCond %{REQUEST_URI} (/|\.php|\.html|\.htm|\.feed|\.pdf|\.raw|/[^.]*)$ [NC]
RewriteRule (.*) index.php


all pages of the site now work exept from /index

to confirm :


sign out

* Dashboard
* My Profile
* Members
* Blogs
* Groups
* Links
* Photo
* Admin

all work

but
* Main (domain.com/index)
does not

if however you click the 'logo' your sent to domain.com/ which works.