I'm one of those rare birds that uses Turn most of the time & am comfortable with it.  (XP w/parallel port.)

The few times I use Mill (standard screenset) something almost always goes wrong; usually self-inflicted.  This time it's the MDI line.  I press alt+2 & the line pops up as normal but when I type in a command, I get a beep as soon as I press enter & no movement from the motor.  Even something simple like "G00 Y2."  Jog works OK; just no MDI.

This is a new build & I only have the Y-axis hooked up & enabled for testing/alignment.  Any guesses to what I'm forgetting?

Computers are so strange.  I connected my back-up CNC PC, copied over the .xml  & it works fine now.  Day of the week ends in Y I guess.