Returned class is null when constructor argument is a reference while using reflection php

I have 2 classes MyClass and MyClass2. I need to call a new instance of MyClass using reflection, passing to the constructor an instance of MyClass2. This works fine until I try using the reference in MyClass2 constructor, $classObject in this case will be null.

Why is this problem occurring? Knowing that this does not happen while testing a similar function call between two function within the same class!!

$className = 'MyClass';
$args = array(new MyClass2());
$classReflection = new ReflectionClass($className);   
$classObject = classReflection->newInstanceArgs($args);

MyClass

public function __construct(&$myClass2)