I did not find any blocks in two days. My mine work very well, who can tell me where is the problem?
There is no problem at all. The difficulty is very high and the calculation right now shows 1.5 blocks per day for your hashrate. But it's a game with the probability and luck. It can easily happen to not find a block for many days(could be weeks) or to find more blocks in the same day

good luck
Which calculator do you use (link)?
There is no calculator link. I'm calculating by myself.
The formula is:
2^32*diff/hashrate
And You get how many seconds does it need to find a block.
Then if you divide by 3600 you get how many hours does it need to find a block...
another method to find daily block count...(doesnt involve difficulty value)
just set the ratio of 1440 blocks over net hashrate equal to the ratio of "X" blocks over your hashrate,
and solving for "X" will give you # blocks you will find every 24 hours.
this works because 1440 is number of blocks the network hashrate finds in 24 hours, give or take a couple ( 1 minute blocks)