UCCNC Velocity issue

Hi,

My Y axis Velocity is set at 4200 as my workshop is cold at the moment I want to set it to 3000. For some reason when I change the setting it immediately flips back to 4200. I can change the velocity on both the Z and X axis but not the Y. There must be a setting I am missing but I have no idea where.

Any ideas please

Kafi