What extensions, including the version numbers are installed?
If you have other WebAssist extensions, Make sure Data Bridge was the last WebAssist extension you installed. If not, you should uninstall it and the install it again.
before using Security Assist, make sure you have a site defined:
http://www.webassist.com/tutorials/Define-a-dynamic-site-in-CS5
create a new php page in the site, and define a connection to the database:
http://www.webassist.com/tutorials/Create-a-PHP-database-connection