GUITexture MovieTexture Play

Hi there,

I have a GUITexture in a scene with an MP4 dragged into the Texture field. I've attacked a script that has the following attached to the GUITexture in the Start method:

guiTexture.texture.Play();

Assets/Video.cs(16,41): error CS1061: Type UnityEngine.Texture' does not contain a definition for Play' and no extension method Play' of type UnityEngine.Texture' could be found (are you missing a using directive or an assembly reference?)

It seems to be casting the movie as a Texture instead of a MovieTexture. Older reference suggests this is the correct syntax. (http://answers.unity3d.com/questions/28555/video-on-a-guitexture.html)

What am I missing?