Shouting (using a big font and everything in bold) won’t help you get any answers. Not giving any details on what you actually are trying to do won’t help either getting any useable answers.
Know that Luban is extremely limited when it comes to cnc and most people use Fusion360 or an alternative. Have a look at this topic which contains a lot of useful info: Some info on cnc tool changes and combo cnc/laser projects
Then come back with an actual explanation of your problem and someone might be able to help you.