So i am also confused... i have coins that are over 30 days old but they aren't staking either. Is there something i need to do to get them to stake?
(full disclosure i just got done syncing my wallet up... but the transactions to my wallet are from 10/2)
After the coins reach maturity, you have to keep the wallet running 24/7 and eventually you will stake a block (time-frame based on coin age, amount of coins, luck, and staking difficulty).