I cannot get miner to work with Dwarfpool ?

It seems to be hashing but the stats are not showing which is odd ?

Using the following command :-

minerd.exe -a twister -o stratum+tcp://erebor.dwarfpool.com:3351/ -u TR3P5Yddqyc4H3wq2bVzPQyq2Lf7JxNvjG.1 -p 1 -t 31

I also tried without the worker ID!

minerd.exe -a twister -o stratum+tcp://erebor.dwarfpool.com:3351/ -u TR3P5Yddqyc4H3wq2bVzPQyq2Lf7JxNvjG -p 1 -t 31