We will need some more details on the problem.
Do you get an error message when you open DataAssist or SecurityAssist?
Have you created a Database Connection in Dreamweaver?
In the Database Connection window, what happens when you click the test button? Does it test OK?
If so, on the database tab, expand the connection, then expand the tables, are the table listed here?
Is your site definition created properly? See the following for information on crteating a Dreamweaver site definition:
If you are using a remote server for your testing, you may want to consider using a local server: