I just received an email from a signing service with this link to fix the problem.
Steps to turn off the 'Protected Mode' :
1. Launch Acrobat
2. Click on Edit (from Menu Bar) > Preferences
3. Click on 'Security (Enhanced)'
4. Uncheck 'Enable Protected Mode at startup (Preview)' > Click Yes (on popup)
5. Restart Adobe and make sure the changes took.
Here is the link that was listed also.
http://community.adobe.com/t5/acrobat-reader/quot-choose-paper-source-by-pdf-page-size-quot-not-working/td-p/11819838#M76006
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