$db->loadResult();
is used to load a single value results (for example if you would only want to select the country name or something like this), but in your query you're selecting an entire row, so you should use one of theese:
$db->loadRow(); // returns an indexed array from a single record in the table
$db->loadAssoc(); // returns an associated array from a single record in the table
$db->loadObject(); // returns a PHP object from a single record in the table:
You can read more about this here (it's joomla 1.5 documentation, but it's same for 2.5 and 3)