What do you mean that it doesn't report assigned difficulty?
I am also using the same miner.
I can see the difficulty like "Accepted 09bb8886 Diff 0.103/0.020 GPU 0".
0.020 is the difficulty assigned.
Are you using the same workername for several miner rigs? You'd better separate each of them.
If it doesn't help, please tell me your username. I will look through it.
In most cases (there are rare exceptions) it reports "Accepted 288whatever Diff -0.000/-0.000 GPU 0 at Pool 0"
Edit: Just tested the compiled version from the official Darkcoin homepage.
This one reports "Accepted 26000000 Diff 0/0 GPU 0 at (null)" And ALL accepted shares of this one have 6 trailing zeros...
How about using the miner we posted on our pool homepage?
https://mega.co.nz/#!SQJC2ZQQ!w-m3MtZW2UcBxpp6c0Tewo0edeW8e30BP50lG2xcxwk
It's a bit older but miner speed is just same as the latest.
It would be helpful if you attach or send me screenshot for it at [email protected]
Thanks.