Problems Getting rid of index.php from URL

[eluser]Oussama M Billah[/eluser]
Hello,

I followed the user guide instructions to remove the index.php from the URL but I get a 500 Internal server error when creating the .htaccess file.
that i have in the .htaccess file

Code:

RewriteEngine on
RewriteCond $1 !^(index\.php|images|robots\.txt)
RewriteRule ^(.*)$ /index.php/$1 [L]

I looked at other solutions in the forum but was not able to get it to work?

I m working on a windows machine running apache 2.2

Any help?

Thanks
Oussama