Gradient banding in flash

Does anybody know the solution to the gradient banding when you publish a swf file???
I need to create gradient background for the flash web site. I tried to apply smoothing, publishing with high quality, making the gradient half transparent…etc…nothing works. I also tried to make a gradient in photoshop and export it as a high quality jpeg into flash. It looked terrible as well! I’ve searched everywhere for solution…please help!