HELP! Dreamweaver MX 2004 & Fireworks MX Problem!

I created a nav_bar in fireworks mx and and exported into Dreamweaver MX 2004 as a library item. I open the library item in Dreamweaver to edit it in fireworks to build a pop up menu, everything goes fine building the pop up menu, Fireworks updates it, but once it is back in dreamweaver I cannot see the pop up menu, even though all my web pages are updated, I click on that button that is suppose to have the pop up menu in a browser and it takes me to the same web page. What am I doing wrong? Please help.