Internal Server Error - htaccess

I have a htaccess file that it work perfectly on host but when I put it on local ,it shows me this error:

> Internal Server Error > > The server encountered an internal error or misconfiguration and was > unable to complete your request. > > Please contact the server administrator, admin@localhost and inform > them of the time the error occurred, and anything you might have done > that may have caused the error. > > More information about this error may be available in the server error > log.

I found this alert in error log file :

> [Tue Apr 17 10:02:25 2012] [alert] [client 127.0.0.1] D:/wamp/www/jivan/sql/.htaccess: Invalid command 'Header', perhaps misspelled or defined by a module not included in the server configuration

this is my htaccess file code:

  RewriteEngine On
AddDefaultCharset utf-8
RewriteRule ^([0-9-]+)/keyword_show.html$ keyword_show.php?keyword_id=$1
RewriteRule ^page_(.*).html$  page.php?url=$1
RewriteRule ^([0-9-]+)/(.*)/(.*)/(.*).html$ $2.php?advertisement_cat=$1&id=$3&pagenumber=$4
RewriteRule ^([0-9-]+)/(.*)/(.*).html$ $2.php?advertisement_cat=$1&pagenumber=$3
RewriteRule ^([0-9-]+)/(.*).html$ $2.php?advertisement_cat=$1
# cache images and flash content for one month
<FilesMatch ".(flv|gif|jpg|jpeg|png|ico|swf)$">
Header set Cache-Control "max-age=2592000"
</FilesMatch>

# cache text, css, and javascript files for one month
<FilesMatch ".(js|css|pdf|txt)$">
Header set Cache-Control "max-age=2592000"
</FilesMatch>

my local server run by wamp and I enabled rewrite module too!!!

so what`s the prob?!!

the Header directive is in the mod_headers apache module. You need to make sure that module is loaded into the apache server.

Steps to enable HEADERS modules

$ cd /etc/apache2/mods-available
$ sudo a2enmod headers
$ /etc/init.d/apache2 restart

On your command line:

Install mod_headers

sudo a2enmod headers

and then restart apache

service apache2 restart

Try this:

<IfModule mod_headers.c> Header set [your_options] </IfModule>

Have you restarted WAMP after installing / enabling?

In an Ubuntu/Debian Machine you can simply run this command:

sudo ln -s /etc/apache2/mods-available/headers.load /etc/apache2/mods-enabled/

and should be all set.....

If you are using WAMP server, do the following

1. Left click on Wamp tray icon.
2. Go to Apache -> Apache Modules.
3. Enable 'headers_module' from the list of modules.
4. Restart the wamp server or Restart All Services.