mod_rewrite is not working with htaccess

I tried all solotions posted on this forum, this is my httpd.conf:

Code:

<Directory /srv/www/*/web>
    Options +Includes -Indexes
    AllowOverride None
    AllowOverride Indexes AuthConfig Limit FileInfo
    Order allow,deny
    Allow from all
    <Files ~ "^\.ht">
    Deny from all
    </Files>
</Directory>

<Directory /srv/www/*/user/*/web>
    Options +Includes -Indexes
    AllowOverride None
    AllowOverride Indexes AuthConfig Limit FileInfo
    Order allow,deny
    Allow from all
    <Files ~ "^\.ht">
    Deny from all
    </Files>
</Directory>

<Directory /srv/www/*/cgi-bin>
    Options ExecCGI -Indexes
    AllowOverride None
    AllowOverride Indexes AuthConfig Limit FileInfo
    Order allow,deny
    Allow from all
    <Files ~ "^\.ht">
    Deny from all
    </Files>
</Directory>

and this is my .htaccess:

Code:

RewriteEngine on

RewriteRule ^(.*)\.html$ index.php?Level1=$1
RewriteRule ^$ under_constructions.htm

Sometime I got error 500, and somtime 430.

When I remove the .htaccess file the website shows fine.

Thanks.

 

Are there any errors in Apache's error log?