I followed all the steps descriped here:
Take a look at the screenshot I've taken of my project. The .sdocml file is there within the project.
By making a new local project (not an existing project) the code assist works perfectly. I've tried a PHP project a WEB project and both a WEB and PHP project, but none of it works.
I regularly get an error message "Content Assist" did not complete .... as well (look at the attachment)
I'm using Win 7 64bit
For more details have a look at the config file I've attached