Getting the component of an Entity!

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C++

Hi,
I have an Entity class where I am adding components like this -

CTransform transform;
ent.addComponent(&transform);

And

void addComponent(CComponent* component);

template<typename T>
T* getComponent(E_COMPONENT_TYPE type)
{
    return dynamic_cast<T*>(mComponents[type]);
}

Now when I try to get a component like -

CTransform* trans = getComponent<CTransform>(ECT_TRANSFORM);

I am getting error in dynamic_cast.

Thanks in advance.