UNLOCK TO MINE
Some coins require you to unlock the client / wallet to mine the coin. If you've encrypted the wallet of certain coins, you can't mine the coin while the wallet is locked.
How to unlock the wallet?
1. Open the client.
2. Go to Help > Debug Window > Console and enter what is below
walletpassphrase "your wallet password" 50000 true
3. Enter the wallet password above without the quotes. The 50000 is the total time it will be unlocked.
4. You should now see the lock icon on the bottom right corner of the wallet look like it's unlocked.
COINS THAT REQUIRE UNLOCKING TO MINE
< more coins to be added >
Edited by Jimmy, 29 January 2014 - 08:25 PM.
Added / Updated Information.