when I access the website under Installation prerequisites it highlights MOD_REWRITE REQUIRED meanwhile the .htaccess already has this (see below). please advise.

# OpenSource-SocialNetwork
#
# @package (Informatikon.com).ossn
# @author OSSN Core Team <[email protected]>
# @copyright 2014 iNFORMATIKON TECHNOLOGIES
# @license General Public Licence http://opensource-socialnetwork.org/licence
# @link http://www.opensource-socialnetwork.org

Options -Indexes
Options +SymlinksIfOwnerMatch
DirectoryIndex index.php

<Files "error_log">
order allow,deny
deny from all
</Files>

<FilesMatch "(nginx|htaccess).dist">
order allow,deny
deny from all
</FilesMatch>

<IfModule mod_mime.c>
AddType image/vnd.microsoft.icon .ico
</IfModule>

<IfModule mod_expires.c>
ExpiresActive On
ExpiresDefault "access plus 1 year"
</IfModule>

<FilesMatch ".(jpg|jpeg|gif|png|mp3|flv|mov|avi|3pg|html|htm|swf|js|css|ico)$">
FileETag MTime Size
</FilesMatch>

<IfModule mod_rewrite.c>

SetEnv HTTPMODREWRITE 1

RewriteEngine on

RewriteRule ^rewrite.php$ installation/tests/apache_rewrite.php [L]

RewriteRule ^action/([A-Za-z0-9\-/]+)$ system/handlers/actions.php?action=$1&%{QUERYSTRING} [L]

RewriteCond %{REQUESTFILENAME} !-d
RewriteCond %{REQUESTFILENAME} !-f
RewriteRule ^([A-Za-z0-9\_-]+)$ index.php?h=$1 [QSA,L]

RewriteCond %{REQUESTFILENAME} !-d
RewriteCond %{REQUESTFILENAME} !-f
RewriteRule ^([A-Za-z0-9\_-]+)/(.*)$ index.php?h=$1&p=$2 [QSA,L]

</IfModule>

<IfModule modphp5.c>
phpvalue memorylimit 128M
phpvalue registerglobals 0
phpvalue postmaxsize 8388608
phpvalue uploadmaxfilesize 5242880
phpvalue default_charset "UTF-8"
</IfModule>

<IfModule modphp7.c>
phpvalue memorylimit 128M
phpvalue registerglobals 0
phpvalue postmaxsize 8388608
phpvalue uploadmaxfilesize 5242880
phpvalue default_charset "UTF-8"
</IfModule>