Thanks for answering Jason. I was trying to install it on my personal home older iMac (2006/7) running Dreamweaver CS4. I have the extensions installed on my work computer, which is a newer Mac Mini, running Lion and CS6/CC.
I have norton anti virus and firewall software running, which I manually turned them off and still got the same message.
I need to be able to work from home due to our offices being shut down for almost 2 weeks last year due to Hurricane Sandy. We dont know what this hurricane season will be like and obviously need to the ability to work from home.