Default controller doesn't appear to be working

[eluser]feejin[/eluser]
My local development site in MAMP works fine, put it on my live hosting in a subfolder for testing and I get 404 errors when I don't pass a controller.

E.g.

http://www.website.com/dev/ <-- 404
http://www.website.com/dev/Blog <-- Works correctly

I'm using this .htaccess to remove index.php from the URI:

Code:

RewriteEngine On

# Have tried with and without RewriteBase
RewriteBase /dev/

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

Hosting definitely supports mod_rewrite, I have other stuff on there using it - including a Wordpress install that uses a very similar rewrite.

I've printed out the $_SERVER variable and it shows that it's going for the right script (http://www.website.com/dev/index.php)

In config I've set everything up like (I think) it should be, relevant parts are:

Code:

$config['base_url']    = "http://www.website.com/dev/";
$config['index_page'] = "";

And in routes I have

Code:

$route['default_controller'] = "Blog";

Any idea what might be wrong? Hoping it's something simple, this is driving me crazy!

Thanks,
Colin