Did anyone get error when trying to import priv key? i get

Error adding key to wallet (code -4)
Help / Debug window / Console
walletpassphrase "your wallet password" 5000
The 5000 is the total time it will be unlocked.
then do the private key thing with your code, etc. and it will download yous SYS to your wallet
your wallet should automatically relock i think, no need to 'relock' it manuallly