Resizing Flash Movie?

Hi,

I've created a flash movie using 640x480 document size.
In the published SWF file, the size looked fine when the window was maximized, but I've just published an HTML format, and all the the frame was really small and tucked in the top left corner of the browser.
I've tried typing a "100%" value in the Height field of the HTML file, but this just centered the animation, it didn't scale it.

Is there any way to fix this problem?
Do I have to go back to the FLA file and edit all the symbols and raw data, keyframe-by-keyframe?

Thanks so much,

Did you set <div> to restrict the flash area?
I think if you'd better paste a link here for someone to look into the problem.