Downloaded the new Peercoin upgrade, saved theold wallet DAT file, synced new wallet. Then tried to remove new wallet DAT file and replace it with the old one to recover my peer coins and addresses but I still see a zero balance. What am I doing wrong. I have my public and private keys from my old wallet. Is there any way round this to put my old address into the new wallet?
Did your wallet sync?
You can add private keys with the console (importprivkey {your key here}), but you should be able to just copy in the wallet.