Originally Posted by ant512
If you're changing the size of the canvas in Flash's properties pane, you're not changing the resolution. You're making the available space smaller, but leaving all of the movie clips at their default sizes. The only way to change the size of the game is to either scale it in the HTML embed tag (change the width and height) or to manually resize all of the movie clips within the Flash file. However, this might cause problems depending on how I deal with co-ordinates (can't remember now).
Or just link directly to the swf file in the browser... ie; NOT blabla.com/flash.html, but blabla.com/flash.swf... that way the screen size is the same as the browser window and easily resizable.