Problems with Config file in custom Libarys [solved]

[eluser]n8m[/eluser]
I read in the 1.5.4 User-Guide for Codeigniter, that variables and configuration can be passed to custom libraries. Somehow i have no luck with that. I tried both ways:

I try to pass values through the Controller that calls the Library by doing this:

Code:

$bla=array('foo'=>'ba');
   $this->load->library('widget',$bla);

also i tried to put the $bla stuff in a config file (which i am mainly interested in).

i tried to call the foo value in a method of my custom library the normal way like:

Code:

function test1(){
     echo $foo;
    }

What have i done wrong? Did i miss something?

Greetings and thanks in advance
n8m