how to mine? xmr-stak using monerov7 does not work. All shares rejected
If you follow the link in the post right above yours. You will find that the fork will be on block 204000 and that the new algo be called CN-fast.
Last block: 198842
So not quite there yet
EDIT: I just now realize that there was a previous fork... sorry about that. Not sure why Monero7 is not working for you..