Relative path loading in loaded swf

programming flash
1 
/
|-main.swf
|-game
  |-game.swf
  |-assets
    |-a.jpg

let’s say I have a file structure like above, I have game.swf loads resource by relative path like “assets/a.jpg”. It runs fine on its own.
But when I try to load game.swf from main.swf (using relative path again “game/game.swf”) it tries to find a.jpg from “/assets/a.jpg” instead of “/game/assets/a.jpg”
that was a big surprise to me
do any of you have the same problem~? is there any way to fix it~?

please help~~