Unable to fetch Buyer E Mail , WHAT is PII and how to get PII Access
You need to go back and read the help files and conditions under which you agreed to when applying for access to MWS.
Developer Guide and especially the White Papers section.
I would suggest reading the developer FAQ especially items 10 to 12:
http://docs.developer.amazonservices.com/en_US/faq.html
David Nelson
Dynamic Enterprise Technologies Inc
Seattle Washington USA