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