Cant see water threw glass?

Hi, So I set up this scene were there is water behind a wall of glass but for some reason you cant see the water from behind the glass. The only way you can see it is when its rushing out threw the hole. Here is a picture.

So can anyone tell me why its doing this?

This happened in earlier versions of Blender but with particles. If the glass is on raytrace, switch to approximate.

I don’t understand, I think I see the water distortion, perhaps you need to increase the alpha some?