Using model in a model

[eluser]sigma[/eluser]
Hello

I've got following Problem:
I'd like to use a model in an other model. Something like this:

Code:

class Location extends Model{
      public function get($ID){
                //Other Stuff
                $this->load->model('locationType');
                $this->locationType->setID($result->LocationTypeID);
                $this->locationType->setTitle($result->TypeTitle);
                $this->_locationType = $this->locationType;
                //Other Stuff
    }
}

But there is allways following error-message:

A PHP Error was encountered

Severity: Notice

Message: Undefined property: Location::$locationType

Filename: models/location.php

Line Number: 62

Can anybody help me please?

Greets