Let's first determine if that is the problem. There are a couple of places in the php.ini where file size can be limited. Does it work with a smaller .docx file?
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.