Open your wallet, click on the icon with working-instruments (wrench&screwdriver), click Console tab, and input
getstakingstatus
You should get smth like this:

{
"validtime": true,
"haveconnections": true,
"walletunlocked": true, ===========if you LOCKED your wallet with a password, staking won't work!
"mintablecoins": true, ==============if you have mature coins it is TRUE
"enoughcoins": true,
"mnsync": true, =============if the wallet is fully synced
"staking status": true ============if staking=1
}
Yes, thanks for your help, man.
I have synced my wallet. I just needed in matured coins.
![Roll Eyes](https://bitcointalk.org/Smileys/default/rolleyes.gif)
For now my PoS working good
![Smiley](https://bitcointalk.org/Smileys/default/smiley.gif)