initialPlaybackTime & endPlaybackTime not working in VideoPlayer

Hello,

I am unable to set initialPlaybackTime & endPlaybackTime for video . Working in Titanium 1.8.2 sdk for iPad . Please help to resolve the problem, Looking for positive response.

var Movie = Titanium.Media.createVideoPlayer({
 
        backgroundColor:'#111',
        movieControlMode:Titanium.Media.VIDEO_CONTROL_DEFAULT,
        contentURL:"name of video",
        scalingMode:Titanium.Media.VIDEO_SCALING_MODE_FILL,
        initialPlaybackTime:20.00,
        endPlaybackTime:30,
    });