Once you have all the statues and are at the pentacle place the six statues on the table. You need to put each statue in the proper place- Aeneas goes on the lower right point, Mars on the Upper Right point, Cupid on the Lower left, Jupiter at the top, Venus in the center and Vulcan on the Upper Left.
Have all the statues facing Venus in the middle and venus should be facing the Aeneas statue. This should solve the puzzle and trigger the cutscene.