the following extensions are not compatible with DW CS6:
Surveyor108.mxp
WebStandards102.mxp
ProMapsGoogle107.mxp
WA_SiteImport304.mxp
WASocial200.mxp
Social Media Toolkit, Pro Maps, and Site Import are now a part of Design Extender.
Web Standards and Surveyor where discontinued and have not been updated for DW CS6, you will need to use them in the previous Dreamweaver version if you wish to continue using them.
you should uninstall all 7 extensions, then reinstall Data Bridge and Free tools, also Delete the Dreamweaver Cache file from the users configuration folder:
http://www.webassist.com/tutorials/Common-installation-issues