Installation: Mod-rewrite Error on JustHost Platform

Hello,

I wonder if you can help

I have just tried to install the Omeka platform on to my hosting account and to set it up via a sub-domain at omeka.livingrefugeearchive.org However, I keep getting the error message:

Omeka Installation Error
mod_rewrite is not enabled.
Apache's mod_rewrite extension must be enabled for Omeka to work properly. Please enable mod_rewrite and try again.

I have tried editing the .htaccess file (see below) but this doesn't seem to help and just wondered if there is anything obvious that I am missing as I am quite new to doing this and learning as I go along- any help or assistance would be very much appreciated.

RewriteEngine on

# If you know mod_rewrite is enabled, but you are still getting mod_rewrite
# errors, uncomment the line below and replace "/" with your base directory.
#
# RewriteBase /

# Never use www in the domain
# Replace 'example.com' with your domain name
RewriteEngine on
RewriteCond %{HTTP_HOST} ^www.(([a-z0-9_]+.)?omeka.livingrefugeearchive.org)$ [NC]
RewriteRule .? http://%1%{REQUEST_URI} [R=301,L]

# Allow direct access to files (except PHP files)
RewriteCond %{REQUEST_FILENAME} -f
RewriteRule !\.(php[0-9]?|phtml|phps)$ - [C]
RewriteRule .* - [L]

RewriteRule ^install/.*$ install/install.php [L]
RewriteRule ^admin/.*$ admin/index.php [L]
RewriteRule .* index.php

Many thanks in advance and best regards,

Paul Dudman