How reload config file

Hi
I have a script file that when i run it command line and start in loop for accept socket
There is big problem
On start script file,i load config file and i use it in this file
But when i change config file,i have to can access to new data

Example $config['title'] = 'hello';

And run php script.php and waiting...

I change title to world

But because file is running,i cannot access to new data
I try to reload with $this->load->config('my_config')
But it is unless

Please help me