
Flash Player 9 includes the ability to upscale your SWF to completely fill the screen. Unfortunately, full screen mode is not enabled by default when publishing a SWF from Flash. How you enable it depends on the version of Flash you're using. Here's how.
If you are using Adobe Flash CS3 or CS4, open File > Publish Settings and click on the HTML tab. In the "template" drop down, select "Flash Only - Allow Full Screen." Your published HTML/SWF will now support full screen mode.
If you are using Flash 8 or Flash MX 2004, you need to edit the player embed code your version of Flash publishes. To do so, publish an HTML/SWF using the default HTML template. Afterward, open the HTML document in a text editor and add the following amongst your param elements:
<param name="allowFullScreen" value="true" />
Next, add allowFullScreen="true" as a new attribute anywhere inside the embed element, like so:
<embed allowFullScreen="true" .../>
It's on by default, but just to make sure check the OPTIONS/Full Screen Take Over parameter to ensure it's set to "On". This allows the SWF to scale to the full dimensions of the display.
That’s it! Your HTML/SWF are now supporting full screen mode and the navigation button should function appropriately.