What version of Data Bridge do you have installed?
Please make sure you are using the latest version 1.0.8, if you have a previous version, you will need to uninstall it from the extension manager beofer installing the new one and then delete and regenerate the data assist pages.
the issue you report seams like something that was fixed in the newer release, also, make sure to Delete the Dreamweaver Cache file from the users configuration folder:
common_installation_issues.php