If Dreamweaver closely matches code but not exactly it can crash like that.
I'd remove the comments in the beginning of the code and that should allow you to freely edit the code below without dreamweaver freaking out.
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.