i still have a zero Stake balance and i'm not minting. anything i'm doing wrong?
Probably not. There is a small artifact of peercoin that causes about a 1 to 1.5 day delay before minting once coins are mature. Peercoin has a 30 day maturity, so it's not noticeable in that coin. StealthCoin has a much quicker maturity, so the delay is noticeable. We have a fix to tighten up the actual staking times to agree better with specifications. The fix will probably go into the next release.
You will still earn full interest with the delay, so it does not impact your earnings.
is it ok if my wallet is not encrypted? or is that necessary?
Why you want to take risk with you coins, encrypting won't take much time.
Just put passphrase and when you staking just unlock it.
How do I unlock, my friend?