What extensions are installed includeing the version numbers?
The extensions that we offer that are compatible with DW CS 6 are:
Free Tools 1.0.5
Design Extender 1.1.5
Data Bridge 1.1.4 (this is a consolidation of our Data driven extensions including an upgrade to Data Assist 3 and Security Assist)
if you are using the stand alone versions, they are not compatible with DW CS6, you will need to continue using your previous version of Dreamweaver.