image effect not working Unity pro3.3./.

My Unity us Unity3d pro 3.3
I want to make it worked image effects such as motion blur,
It this right?

1.asset->import new package->image effects;
2. In camera game object,component->image effects->motion blur,or gray scale.
. But present Unity3d pro 3.3,it doesn’t respond
at all.Has anything been changed?What did I do wrong?

re-import the image effect again? That work for me last time when i move from unity 3.2 to 3.3

Motion blur is working great and you did the right steps