Thank you.  Error:
minerd: unknown algorith -- '--scrypt'

Hi guys, Noob here.  I am trying to mine NYC.  Followed instructions on pool site.  Created account, created worker.  Downloaded MinerD (PoolMiner 2.5.0).  Created the "RunMe.bat" file.  I copied this "minerd -a --scrypt -t 6 -s 4 -o stratum+tcp://hobbyistpool.ddns.net:4342 -u Weblogin.WorkerName -p WorkerPassword" into the "runMe" file and changed weblogin, worker name and password.  When I run the file black screen comes up for millisecond and disapears.  Can't find any videos or instructions on how to fix this.  Please help?