How can you get Captivate 5.5 to support transparency from imported images?

ABOVE: Above is a published video. The edges on this PNG are appearing jagged, an undesired affect, which I am guessing is the result of a transparent background around the circle. Why doesn't Captivate handle or support transparency better? Should I be using a different file type? Does anyone know how to resolve this?

ABOVE: This is the imported image before being imported.

ABOVE: Here is how the PNG looks in the Captivate filmstrip preview.