Removing index.php from url

[eluser]Computerzworld[/eluser]
Hello. I am having problem in removing index.php from url. I made one htaccess file for this and also removed index.php from config file like this.

Code:

$config['index_page'] = "";

Here is my htaccess code.

Code:

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

This works perfectly in my windows environment but doesn't works with linux environment. In windows all the urls are without index.php and the same code I have uploaded to linux server I have to write index.php after url for the first time after it works. I don't know what is the problem behind it. Please help me. Thanks in advance.