Two quick things to try.....
Can you try renaming your security rule so it has no spaces? I don't know if it makes any difference, but being a programmer I never use spaces in anything.
What files are in the webassist/security_assist/ directory on the server?
Regarding CS6, yes there are well documented features on this forum at the MAC version of CS6 has a problem with Data Bridge and the guys at WA are working to resolve this. I'm staying away from CS6 until everything (not just WA stuff but the product itself) is stable. I depend on Dreamweaver for my living so to install it on my production machine at the moment would, in my mind, be suicidal.