"Dreamweaver 15.1"
Which version is that?
according to this chart:
http://en.wikipedia.org/wiki/Adobe_Dreamweaver
the versions go to 14?
What extensions including the version numbers do you have installed?
Have you also installed the Depricated server behaviors?
http://www.webassist.com/tutorials/Deprecated-Server-Behaviors-for-Dreamweaver-Creative-Cloud