image effects not working in pro

I have unity pro and iphone pro and a project with image effects package added. I have a main camera view which I add the component greyscale image effect. I check the checkbox and the entire game view turns pink/purple indicating something is missing. I have the standard packages included. My video card is an NVIDIA Quadro FX 4500 which is about 2007. I’m not sure how to check if it has open gl 2 es. But It should work according to the specs.

Also this is an iphone project.

I don’t get any errors otherwise.
Is this the correct way to use one of these effects?

Dan

I had to open up the build settings -->go to player settings -->look in the inspector and switch the target platform to iphone universal arm6 and 7 opengl 1.1+2.0. Now it works.