Help me to load one swf into other swf?

hello all,
i have created two swfs called intro.swf and buttons.swf.
in my intro.fla after showing some intorduction i used [loadMovie(“buttons.swf”, _root);] to load my buttons.swf to show my buttons. then i puslished both of them into swf files. the swfs are working fine.
then i embeded intor.swf into my html page using Dreamweaver.
**The problem: **when i open my html page in the browser only intorduction part is displayed and not the buttons part(i mean buttons.swf).
i dont know what the problem is! do i need to add any attributes in my html or any other stuff?
Please help me in this,
Thank you