Forum:Chain link problem

Hey I want to ask something about Chain Link,Is the Last One activated is the only one that active? For Example Rainbow Dragon Attack->Magic Cylinder->Trap Stun->Rainbow Life.so which one active? my friend Said that the Last one Is the Only one that Activated So Only Rainbow Life Activated he say.but Trap stun Effect says that all trap cards that activated in this turn is Useless So Which One is Activated?Trap stun Or Rainbow Life? (BTW, this question was not made by me (Shrev64), rather, it was made by Unregistered User 110.138.73.185)