Hi Canonman,
Please could you post what the error message is? What page are you trying to preview when you see the error message?
You could easily download all of the documentation and put it on a disk - I find it easiest just to put it in a folder in the local root of the site I am currently working on so I can have it handy from within dreamweaver. I don't think WA provide it on disk, but I may be wrong.