FLASH: Test Shows FLVPlayback Icon instead of a Movie

I'm using Flash version 9.0 that came with CS3 Professional on WindowsXP. Before I joined my company, we outsourced a Flash project to a creative design firm, whose experience was only so-so. As a result, they embedded all of the video rather than streaming it. Our end product will be delivered in two ways, on CD and online. I'm updating the CD version of this project right now which includes streaming the video instead of embedding. In addition to the movies, the project includes sound and motion layers.

In a test scene with no other layers, I'm able to add the FLVPlayback component and link it to the FLV source file. When I test the file, it plays fine.

In other scenes, where I have already added the other elements to the project, I follow the same steps outlined above and instead of having a movie play during testing, I get the FLV icon rapidly blinking on a white background in the top, left corner. It begins at the appropriate frame and continues until the scene ends.

The same result occurs when I publish the project, too.

I have all the elements to the entire project built and all I need to do is add the FLVPlayback components. I'd rather not have to start this project from scratch.

Thanks.