Anyone have any idea why sgminer won't mine any shares on cryptogrinder?

I'm following the guide on page one.

sgminer starts up and shows it is connected and hashing, but no shares and no stats on the "workers" list for my wallet.

So I tried cpuminer and it is working as expected. Starts earning shares within a few seconds.

I have used sgminer to mine other coins/algos without any problems.

Is there a trick to getting sgminer (with an RX480 8GB) to mine Fujicoin on cryptogrinder?