I can not access application via uri class

[eluser]Unknown[/eluser]
:cheese: Ok Im straight off the boat today.

Problem is that I can not get output as is suggested in hello world video tutorial.

so e.g. :

class Snore extends Controller
{
function hello (){echo "Hello World";}
}

index.php/classname/ will not output hello world

until I declare function in uri

index.php/classname/function/ works.

Is this correct?