Export problem

ok, i have been making a fla, which controls all the inventory/weapons for the game i have been making. this fla uses external classes, now when i use ctrl + enter in flash to preview the movie it works, however, when i try in a web page it doesnt want to work. i am using import to get the external files, and i have added in the class path in the flash publish settings. can anybody tell me what im doing wrong?