Using CS8.3, I want to have 2 buttons on the screen that each link to a different part of my video. I want the user to have to select one of the buttons in order to proceed with the video. I have created the 2 marker points and I have added 2 callout buttons and made them hotspots with the settings 'Pause at end of callout' and 'Go to marker' selected. But when I produce my video as mp4, the video plays on past the hotspot screen. What am I doing wrong?