Some thoughts:
Is the spindle running? I know on the Doosan machines I used to work with there was an M-code that allowed the machine to feed with the spindle not turning.
Is there an alarm?
Are you putting a decimal at the end of the F10.? If it's just F10 you could be feeding at 0.001 IPM.
Maybe it's reading ahead and something in the folllowing blocks is causing it to stop.