How do you tell what you have done so far in the pool?



Also, it seemed that everything was fine yesterday and all of a sudden I am getting errors:

2014-01-20 15:10:32: Running command: poclbm.exe USER:PW@api2.bitcoin.cz:8332 --device=0 --platform=0 --verbose -r1
2014-01-20 15:10:32: Listener for "Default" started
2014-01-20 15:10:32: Listener for "Default": WARNING: ADL missing (no AMD platform?), temperature control is disabled
2014-01-20 15:10:32: Listener for "Default": 20/01/2014 15:10:32, started OpenCL miner on platform 0, device 0 (GeForce GTS 250)
2014-01-20 15:10:32: Listener for "Default": api2.bitcoin.cz:8332 20/01/2014 15:10:32, checking for stratum...
2014-01-20 15:10:33: Listener for "Default": api2.bitcoin.cz:8332 20/01/2014 15:10:33, diverted to stratum on stratum.bitcoin.cz:3333
2014-01-20 15:10:34: Listener for "Default": api2.bitcoin.cz:8332 20/01/2014 15:10:34, Setting new difficulty: 3
2014-01-20 15:10:35: Listener for "Default": api2.bitcoin.cz:8332 20/01/2014 15:10:35, authorization failed with USER:PW@stratum.bitcoin.cz:3333
2014-01-20 15:10:38: Listener for "Default": api2.bitcoin.cz:8332 20/01/2014 15:10:38, IO errors - 1, tolerance 2

What are those errors and how do I resolve them?

Thank you