El almacenamiento del contrato no cambia en la función de llamada

contract SimpleStorage {
    mapping(bytes32 => string) storedData;

    function set(bytes32 key, string value) {
        storedData[key] = value;
    }

    function get(bytes32 key) constant returns (string retVal) {
        return storedData[key];
    } 
}

En la consola geth:

1. mySource = 'contract SimpleStorage { mapping(bytes32 => string) storedData; function set(bytes32 key, string value) { storedData[key] = value;} function get(bytes32 key) constant returns (string retVal) { return storedData[key];}}'

2. myCompiled = web3.eth.compile.solidity(mySource)

3. myContract = web3.eth.contract(myCompiled.SimpleStorage.info.abiDefinition);

4. SimpleStorage = myContract.new({from:web3.eth.accounts[0], data: myCompiled.SimpleStorage.code, gas: 10000000})

5. miner.start()

6. SimpleStorage.address (I get "0x03b6676ec81168749af1a92783e67bf3b065add3")

7. SimpleStorage.set.sendTransaction("hash", "value", {from: eth.accounts[0]})

8. miner.start()

9. miner.stop()

10. eth.getStorageAt("0x03b6676ec81168749af1a92783e67bf3b065add3")

Yo obtengo:

0x00000000000000000000000000000000000000000000000000000000000000000

¿Por qué no ha cambiado el contrato de almacenamiento?