What pool are you on? The two I looked at haven't found many blocks in the last 24hrs.
I actually use zpool for this. You can also mine a specific coin there without converting it to btc.
Thanks, I never had tried there besides using conversion since it said on the front page "BTC is the only guaranteed payout currency" and I usually don't want to convert it automatically as I like to keep 25-50% of what I mine in the original currency just in case...