for everyone struggling on how to make their POS work. this is how i fixed my problem:

1. make sure that you have coins that are old enough for staking. not sure about how old the coins should be but im guessing about 3 hours
 since the Min stake age is 3 hours. you can verify this by turning on coin control on options then going to send and selecting inputs. there should be a date column there to verify how old your coins are.

2. once you have verified that you have coins that are old enough. close the wallet then open it again. then before it synchronizes completely unlock the wallet for staking. this was the only i could enable my staking. if i unlocked the wallet after it synchronizes completely the staking doesnt start.

hope this works for you guys. happy staking . . .