Hello, I just started mining the Earthcoin.

http://image.noelshack.com/fichiers/2013/51/1387718546-earthcoinwallet.jpg

I'm told to mine with 300-400 hashes/second, but I never get my coins, why ?

(I downloaded CGMiner and I copied and pasted it with all its associated files on the Earthcoin's folder)

Thank you !