are you using one of the application presets? or using New From Blank?
if you are using one of the presets, are you having Data Assist create the table, or using your own table? if using your own table, can you send a copy of the table structure.
in most cases, this has been an issue with the memory leak.
here are some things to try:
Delete the Dreamweaver Cache file from the users configuration folder:
then restart the computer.
before running the wizard, close the Server Behaviors and Files panels.