CodeIgniter controllers are not loading and giving a 404 error - .htaccess

Question

I am testing gocart (http://gocartdv.com/) and I have installed it in a subfolder called vine-cart, http://www.icas-v.org/vine-cart.
The default controller loads fine but the rest of the controllers return an error 404 message. I have looked through all the similar problems and the possible solutions, implemented them and they don't seem to work.
Please have a look at my configuration settings:
/---------------------------------|.htaccess file settings|---------------------------------/
RewriteEngine On
RewriteBase /vine-cart
### Canonicalize codeigniter URLs
# If your default controller is something other than
# "welcome" you should probably change this
RewriteRule ^(cart(/index)?|index(\.php)?)/?$ / [L,R=301]
RewriteRule ^(.*)/index/?$ $1 [L,R=301]
# Removes trailing slashes (prevents SEO duplicate content issues)
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.+)/$ $1 [L,R=301]
###
# Removes access to the system folder by users.
# Additionally this will allow you to create a System.php controller,
# previously this would not have been possible.
# 'system' can be replaced if you have renamed your system folder.
RewriteCond %{REQUEST_URI} ^system.*
RewriteRule ^(.*)$ /index.php/$1 [L]
# Checks to see if the user is attempting to access a valid file,
# such as an image or css document, if this isn't true it sends the
# request to index.php
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L]
</IfModule>
<IfModule !mod_rewrite.c>
# Without mod_rewrite, route 404's to the front controller
ErrorDocument 404 /index.php
</IfModule>
/---------------------------------|Config.php settings|---------------------------------/
$config['base_url'] = 'http://www.icas-v.org/vine-cart/';
$config['index_page'] = '';
$config['uri_protocol'] = 'AUTO';
/---------------------------------|routes file settings|---------------------------------/
$route['default_controller'] = "cart";
//this for the admininstration console
$route['admin'] = 'admin/dashboard';
$route['admin/media/(:any)'] = 'admin/media/$1';
Ive been trying to debug this for days. Please help.

Answer 1

Can you try this htaccess code? remove rewritebase.
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /vine-cart/
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /vine-cart/ [L]
</IfModule>
What did you name your controller file?
Also it's a good practice to comment out lines on your .htaccess as you test them 1 by 1 if its causing issues.