Problem with activating particle system

In my project I am Instantiating some gameobjects with particles attached as child objects. So I reference them using their name.

         ParticleSystem party1= GameObject.Find("Wow1").GetComponent<ParticleSystem>();
         party1.Play();

this is the code I'm trying to use but it doesn't work. I checked if it can find the gameObject. It finds without any trouble. But it doesn't activate the particles. Are there any suggestions? Am I doing something wrong?