There are two ways
to use your Word® document in Dreamweaver®.
First of all, you need to "Save as HTML" your document in
Word®.
Once you do that,
you can open the Word® HTML document in Dreamweaver®
or you can click
File--> Import-->Import
Word HTML. If there are errors in the code, which there will be, you
will get a report like this one:

Once you have the
document open in Dreamweaver® , you need to perform
one more important step. You must clean up the HTML code. Word®
adds a lot of extraneous code when it converts to HTML. This
causes a lot of problems for servers, so you need to clean up the code.
Click on "Commands"
and then "Clean up Word HTML"

Usually at this
point all you need to do is click ok, unless you want to change some
of the options. I would leave all the boxes checked.

This report tells
you what Dreamweaver® did to your document.