I check my linda.conf and settings are ok.
My wallet is running 24/7, but in 2 weeks of staking I had 0 coins!
Do you have at least 100,000 coins staked and what do each of the four status icons indicate when you hover your mouse over them?
Yes I have more than 100k coins.
first icon: Wallet is encrypted and unlocked.
second icon: Staking. Your weight is XXXXXX. Network weight is 511,560,165. Expected time to earn reward is 2 days.
third icon: 61 active connection to linda network
last icon: updated. Processed 282151 blocks of transaction history.
Hmmm. Not sure what else to suggest. That all sounds normal and similar to what I'm seeing, yet staking works fine for me.
Perhaps try staking on a different computer and/or setting firewall/AV rules (or temporarily disabling them). Also if you're using WiFi, try an Ethernet connection and perhaps run some ping tests to make sure your connection quality is consistent and isn't dropping packets.