What is the minimum difficulty (if any), and do you write the difficulty number in your password normally, or do you need to use a decimal format? The reason I ask is because I am attempting to mine scrypt and/or Verge [XVG] with a few of the new Futurebit Moonlander 2 USB miners. I'm not having much luck setting a low enough difficulty for them via the password field as you described. Hopefully there is a solution and/or I am doing something wrong..
Thanks!
d=128 or d=512 should work fine for your Moonlanders.