Unable to open attachment files in Google Doc Viewers

Even though I imagine this is not your top priority. I'm looking for a way to attach documents in the system PDF or DOCS and be able to view them in the browser.

The problem is that Google Viewer does not work with Zoho attachment links.

I've tried to translate a working link here: http://docs.google.com/viewer

and copy paste the address to the browser address bar, google is stuck with translating DownloadFile.do script.

Any chance you have a work around to not download attachment, but work more naturally with the viewing PDFs that are attached to the database?