Same Problem
I had the same problem, I tried to install everything again, now I have this error "while executing onLoadin wamw_serial.htm, the following JavaScript error(s) occured:
At line 214 on file "C:\Programmi\Adobe\Adobe Dreamweaver CS4\Configuration\Shared\WebAssist\CSSMenuWriter\Library\Shared_Ser_Mactivation.js":document.formLayer.document has no properties
This problem for all extension :(