Your config looks perfect. I don't know what 123 miner is, so perhaps that is the issue. Downloading executables from forum posts is a no no. Learn to build from source. Have you tried Thirtybird's version of minerd? It's the most up to date for YACoin. It's at https://github.com/Thirtybird/cpuminer.

You can read my explanation how POS works at http://yacointalk.grokonet.com/t/calculate-your-staked-coins-with-coin-control/41