Did you guys figure this out?  I had this problem when I first started and it turned out to be two things, both part of my log-in credentials. 

1/ Your user name is your account_name.miner_name , you have to set the miner up in your online pool.
2/ The mining address. I started with Multi-pool, and grabbed this link off of their site "stratum+tcp://pool1.us.multipool.us:3334".  The proper link to put into scrypt is "pool1.us.multipool.us"


Don't know if that helped, but I thought it was worth a shot.