Can you try to count what is the possibility to get a bloct when solo and hashrate is 800MHash/s ?
;;bc,calc 800000
The average time to generate a block at 800000 Khps, given current difficulty of 2190865.9701029 , is 19 weeks, 3 days, 3 hours, 15 minutes, and 22 seconds
which of course gets harder every difficulty change at the moment
we are expecting the next increase of between 11 and 12% in 10 hours
of course it would be a killer to wait that long and get an invalid (orphan block)
And that is an average time to generate a block, there is no guarantee that you will generate a block by then. You could easily end up having gone 38 weeks without generating a block.