Struggling with cue points in an interactive video

Hi all.

I have imported a video clip into Storyline 2 and am trying to make it interactive by using cue points to pause it at specific important points, at each of which a layer opens that overlays the video with a message to the user.  Once the user has read it and clicked a "Continue" button on the message, the video needs to continue playing from the point where it last paused.

I have also added shapes (numbered markers) with arrows to point out specific things to the user at those pause points, and have used the timeline to stagger their appearance in the course so that each one coincides with its relevant cue point.  In essence therefore, when the timeline arrives at each cue point, the video must pause, a number and supporting arrow appears to point out something specific on the video and a message displays.  Once the user clicks "Continue", the message, arrow and number disappear and the video continues playing (until the next cue point, when the cycle repeats again).

Unfortunately, however, I can't get Storyline to recognise my cue points.  The layer with the message, as well as the number and arrow, appear at the relevant cue point as per the set up triggers, but the video refuses to pause even though the "Continue" button wasn't clicked.  I have tried using triggers to pause both the timeline and the video, on both the base layer and the subsequent layers, but with no success.

What is the difference between pausing the timeline and pausing the video in my context?

Thanks.