I keep getting message that I need latest version of Adobe to open pdf when I have latest version

I am clicking on a link to open a PDF file but keep getting the following message:

"To view the full contents of this document, you need a later version of the PDF viewer. You can upgrade

to the latest version of Adobe Reader from www.adobe.com/products/acrobat/readstep2.html

For further support, go to www.adobe.com/support/products/acrreader.html"

Meanwhile, I do have the latest version of Adobe.