Issue Images Error

Forbidden
You don't have permission to access /sites/simoes/gaaf/tmp/img/patternheader.png on this server.
Additionally, a 404 Not Found error was encountered while trying to use an ErrorDocument to handle the request.

#
# Monstra CMS :: php & apache settings 
#
# Set default charset utf-8
AddDefaultCharset UTF-8
# Don't show directory listings for URLs which map to a directory.
Options -Indexes
# PHP 5, Apache 1 and 2.

    php_flag magic_quotes_gpc                 off
    php_flag magic_quotes_sybase              off
    php_flag register_globals                 off

# Setting rewrite rules.

    RewriteEngine on
    # Update code bellow for SEO improvements 
    # RewriteCond %{HTTP_HOST} ^www.example.org [NC]
     # RewriteRule ^(.*)$ http://example.org/$1 [R=301,L]
    RewriteBase /mydomain.net/
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^(.*)$ index.php [QSA,L]
    # Update code bellow for SEO improvements 
    # Redirect 301 /home http://example.org/