htaccess issue

[eluser]simon zhao[/eluser]
Hi All,

I got a very tricky issue with my htaccess file.

Following is my htaccess file.
RewriteEngine On
RewriteBase /
RewriteCond $1 !^(index\.php|images|css|robots\.txt)
RewriteRule ^(.*)$ index.php/$1 [L]
When I click on http://mydomain.com/order, it just show home page.the redirection doesnot happen.

But if I change into
RewriteEngine On
RewriteBase /
RewriteCond $1 !^(index\.php|images|css|robots\.txt)
RewriteRule ^(.*)$ index.php/$1 [R=301,L]
It'll redirect to http://mydomain.com/index.php/order, which is the page I want. But I really don't want index.php in URL.

I use justhost server. Can anyone please help me with this issue?