base url problem

[eluser]josh48202[/eluser]
i had my base url set

Code:

$config['base_url']    = "/";

and everything worked. now i wanted to add the whole domain so that the whole domain would show up in the activation email. but when i add the whole domain the images and everything else doent work. im using FreakAuth light so everything is pretty much set up already. can someone tell me y its doin this?