How to mine sha256 on this pool

?
I've tried :
stratum+tcp://sha256.mine.zpool.ca:3333
mybtcadress
c=btc
All my work goes to discarded.
what i miss

?
Thanks in advance.
you missed the ridiculously high worker diff this pool has.. if you have anything less than a s9 you probably wont be able to mine here.