Not sure if you have generated the prov.xml file for CS 6 using unique product identification (LEID). Please try generating the prov file using below command.
adobe_prtk --tool=Serialize --leid=LEID --serial=serialNum --adobeid=AdobeID
You may visit the link below for more information on this.
Let us know in case you would need any further assistance on this.
Thanks,
Ashish