As soon as the block is found you will get your reward. Please wait a little bit more time. We use PPLNS reward system. You should mine while the block is found (even if the block is not found by you).
PPLNS is a collective pool. Miners work together to find a block. When it is found they split the block reward based on their hashrate.
It could happen that on coins with high difficulty it takes a lot of time to find a block. Some hours or sometimes even days! Please be patient or select the coin with a lower difficulty.