Проблема с phpbb

#
# Uncomment the statement below if you want to make use of
# HTTP authentication and it does not already work.
# This could be required if you are for example using PHP via Apache CGI.
#
#<IfModule mod_rewrite.c>
#RewriteEngine on
#RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization},L]
#</IfModule>

<Files "config.php">
Order Allow,Deny
Deny from All
</Files>

<Files "common.php">
Order Allow,Deny
Deny from All
</Files>

RewriteRule ^([^.]+)/?$ index.php?do=cat&category=$1 [L]