remove Index.php Not working in localhost

[eluser]tj[/eluser]
Hai guys I do know that you guys hate to see this topic.I tried to search from old post but didnt find any

So whats my pblm is

in localhost i tried to remove index.php but its not working
BUT it works fine in server

In my config file

Code:

$config['base_url']    = "http://localhost/itech/projectmanagement/";

$config['index_page'] = "";

My .htaccess

Code:

RewriteEngine On
RewriteCond %{REQUEST_URI} ^system.*
RewriteRule ^(.*)$ /index.php/$1 [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L]

can any one help

i am using Apache 2.0 in ubuntu .
tnx in advance