Web hosting

Hey my web page works great when I open it directly from my computer. So I am using a free web hosting client to test it out on the web. The only trouble is one of the buttons to call another swf onto a level doesnt work. The programming of the button is the same as the other ones. and I have the swf uploaded to the same folder on the web but it still doesnt work. Any advise on the difference between on my own comp and online.