I used loadmovie function to load external swf and loadSound to load external mp3 files to flash movie. Basically, it is a flash player which can handle flash movie and sound on web page. And I compile it by mac. it is perfectly if i use mac to view that web page. however, the problem occurs on windows machine. after the first time loading of that page. i refresh. second time, it just stop at loading. it just load first external swf file and it won't load any mp3 files. Everytime, I need to clear the cache file first, then it will work. but it is very weired, if i use standalone player to play that flash, it just run perfect. you may try this on your windows and mac. this is the page: http://www.**--****.com/ ~bukuwa/UPload/UPload_player.html I have update my flash to 7.2 and I keep the web browser flash plug-in on both windows and mac are up-to-date. I wonder what is going on. Would it because of 7.2 update?