Swf loading on a mac

[FONT=Times New Roman][SIZE=3]Hello,[/SIZE][/FONT]
[FONT=Times New Roman][SIZE=3]I am making an html page using dreamweaver 4. My problem is that I have a .swf file (made with fireworks 4) that I want to have automatically resize to fit various screen sizes. When I set the dimensions to percentages in dreamweaver, the page loads fine on my pc, but when it opens on a mac, the swf file will not load. When the dimensions are set to something specific, it loads fine. I am fairly new to this, and was wondering if anyone could advise me on how to have my page resize automatically while still loading on a mac. Please let me know if I didn’t give enough information, my question doesn’t make sense or I should post this somewhere else. [/SIZE][/FONT]

thank you