I have a client that is attempting to open a PDF Document but is is not allowing us to open the file. A message comes up saying "The document you are trying to load requires Adobe Reader 8 or Higher You may not have the Adobe Reader installed or your viewing environment may not be properly configured to us Adobe Reader. For Information on how to install adobe reader and configure your viewing environment please see http://www.adobe.com/go/pdf_forms_configure." We have went through all the step in shutting off the protected mode and we have the latest adobe reader. what are we missing?