Interesting URL problem

[eluser]jazzplayermark[/eluser]
I'm completely new to CI. I'm going through the user guide and trying to follow along to understand the structure and I'm having a problem when submitting a form.

my url to the form is: www.tcfoodtaxi.com/form

after I submit it, the generated url is: http://www.tcfoodtaxi.com/www.tcfoodtaxi...x.php/form

From config.php
$config['base_url'] = 'www.tcfoodtaxi.com/';

I am using .htaccess to eliminate the need to include 'index.php' in the url.

thanks for any help.
mark