Without providing a link to an actual test page it is impossible to give you an answer. It might behoove you to explore more user-friendly methods for building menus in Dreamweaver. They are not free, but worth their weight in gold - especially for non-coders:
Answers to coding questions are contained in your code. Please upload your work to a TEST folder on your server and post the URL here.
A lesser 2nd option is to copy & paste your entire menu code into a web forum reply. Do not use e-mail, it won't come through.