http://pcmining.xyz:8080/tbs is not finding any block with quite good hash rate for more than 24 hours. 
try btcz.suprnova.cc working fine here
The reason why it hasn't found any blocks is likely because of how high the difficulty has been (it's currently 374,027.62) which makes it hard on all small pools.
Please don't start mining on big pools until there are more bigger fish in the sea. The closer any pool gets to 51% network hash power, the more we're at risk of a 51% attack: http://99bitcoins.com/51-attack-simplified-bitcoin-tutorial/
See the current network hash rate graph: https://www.miningpoollists.com/bitcoinz/
Be patient with smaller pools. Your profitability should be about the same no matter what pool you mine on. When difficulty goes up, you make less on all pools. The only differences are:
- With big pools, you get smaller, more frequent payments
- With small pools, you get bigger, less frequent payments
- Each pool has its own fees
Almost Done - 24 hr
spent 24 hours +
