That looks like exactly what the profitability would be for your hashrate. 2.24MH/s is not very much on SCRYPT anymore.
Look at the stats page - WafflePool has been hovering around 0.0045BTC/MH/day lately.
For you, that would be 2.24MH*0.0045BTC/MH/day = ~0.0135BTC/day (So, .01BTC is something like 20-24 hours).
Still more profitable then electricity for me. For many, GPU mining might not be worth it right now. For example, I have very cheap power, and 1/3 of mining income goes to power right now. Many areas pay 3 times as much for power. I will leave that math to you, heh.