Same problem as loafuer describes -- just can't watch TCM on-demand movies in Chrome. (Actually I believe it worked once briefly in Chrome two days ago, out of about 20 attempts covering all times of day.)
We are Dish Network subscribers, for what it is worth. Also, we are running Windows 8. But from the sound of it in another thread, it's not related to our system or login:
Would love to be able to use our new Chromecast!