Hmm ... do some calcs.

Hash rate: 600 kH/s Difficulty: 42

Time to Find a Block

Expected Time 3 days 11 hours

Probability of a Block in 1 hour 1.19%

Probability of a Block in 6 hours 6.93%

Probability of a Block in 12 hours 13.38%

Probability of a Block in 24 hours 24.98%

But the blocks are not waiting. Look at the stats here ... block changes happen within minutes.

This pool does a block in 1min-1hour, average is about 15 mins. Every time the block changes, your "Probability of a Block" is reseted and you start from zero. You have always the chance to find a block with the first few hashes you provide but you have, I think, about 1Gh/s against you from other people around the globe.

Thats a 0.0000000001% chance to get the 200 FC. Good luck.