Not showing

I installed the plugin, selected the area I would like to be for purchase but when I preview I do not see anything.
I can see the code:

[ppw id="27430470" description="Video parts 2-7" price="10"]

[S3VIDEO file='videos/HIVp2.mp4' displaymode='overlay' clicktoplay='PART 2']

[S3VIDEO file='videos/HIVp3.mp4' displaymode='overlay' clicktoplay='PART 3']

[S3VIDEO file='videos/HIVp4.mp4' displaymode='overlay' clicktoplay='PART 4']

[S3VIDEO file='videos/HIVp5.mp4' displaymode='overlay' clicktoplay='PART 5']

[S3VIDEO file='videos/HIVp6.mp4' displaymode='overlay' clicktoplay='PART 6']

[S3VIDEO file='videos/HIVp7.mp4' displaymode='overlay' clicktoplay='PART 7']

[/ppw]

, but the preview shows nothing.

Is there anything else I need to do