How do I get PlayMovieURL to work?

I currently have a button which when pressed calls:

iPhoneUtils.PlayMovieURL (movieUrl, bgColor,iPhoneMovieControlMode.Full,iPhoneMovieScalingMode.AspectFit);

where movieUrl is Home - Curve Games but the screen just goes black for a few seconds, shows the video controls and then goes back to my app. ANy idea why this is?

iphone, Unity 3 Pro.

do you own Unity iOS Pro?

Movie features are iOS Pro only, unity pro does not make iOS basic ($400) a pro version hence would not enable movie playback

I don’t think this API ever got implemented. At 3.5 there is only Handheld.PlayFullScreenMovie().