[support] PDF Reader - Google Viewer Can't find Source File

Hi all,

I'm creating a page, when authenticated user click on a image, opening a new tab showing a pdf. In my content type, the pdf files are saved in a private folder. I'm using Private files download permission 7.x-2.2 to only allow authenticated user to view and download the PDF file. Here comes the problem, when I preview created page, the PDF Reader (PDF Reader 7.x-1.0-rc4. Using Google Viewer) is not able to find the PDF at the original source. But when I click on "here " in error message (I attached the error message), I can download the pdf. The pdf reader working fine when saved the pdf in the public folder, I think the problem is that I store the pdf in private folder. Can anyone help ? Thanks in Advance!

Best, Li