I have one visial that is supposidly a "plugin"

Plugins are usually a plugin for something. You rarely see the word Plugin used by itself. For instance, there are "Photoshop Plugins", "Browser Plugins", and "Winamp Plugins".

The Rio Car is not Photoshop, it is not a Browser, and it is not Winamp. So unless your plugin is a "Rio Car Plugin", odds are it won't work with the player.

Note: There is no such thing as a Rio Car Plugin at this time.