Can I serve Adobe Acrobat PDF files from my web site?
I am getting error messages when I click on a linked file, or when I right click to just try to grab it.

That would depend on what server you are using. But .pdf files aren't exactly uncommon. I couldn't find your .pdf link, so I don't know what kind of error messages you are getting. However, if your server was the problem, you should get an error message when trying to upload, not download.