Error on playing MovieTexture in Unity 3.1

Hi, I am new bee to this engine, So if i am asking a very basic question please excuse. Here is my problem - I am using Unity pro 3.1 (trial version), and I am trying to play a video which is playing in QuickTime Player using movie texture. But only one frame (last frame) is getting displayed with error saying - " MissingMethodException: Method not found: 'UnityEngine.Texture.Play'. at Boo.Lang.Runtime.DynamicDispatching.MethodDispatcherFactory.ProduceExtensionDispatcher () "

Please help me to resolve this.

Thanks in advance- Kiran Viraktamath

Try something like what's on this page:

Probably the mainTexture needs to be cast as a MovieTexture not just Texture (which seems odd, but worth a try)