You can unlock for staking only.
Try typing
`help walletpassphrase`
You should set true after your password for staking only if I'm not mistaken.
[Edit]
Above picture looks good. Should work that way
[/edit]
Thank you cryptofarmer! I just wrote the help walletpassphrase and now I have my coins in the Immature row.. before that there was 0. I guess when the coins mature I will start staking? Anyway I will wait till tomorrow and let you know how it is going!
Ok still got the problem. When I got back from work I checked the wallet and for few seconds it was showing around 60% of my coins in the Immature row and the check mark was green, but after these few seconds it showed the whole amount there and the check mark became gray again

any suggestions?