ZHINT Tooltip + DLL?

Hi,

I am having a single image which contain multiple movies on it and I have to show tooltip when the mouse is hovered over the movies. I am using the ZHint Tooltip control (http://www.zleelz.com/flash/components/view/9/) for this purpose. However, after sometime, the tooltip loses the background color and appears white (with no text on it). Can someone suggest me a fix on it? If this does not work, I would like to know some other free tooltip control where I can control the properties (background color, font style, etc) runtime.

Thanks,