Neje master 2 connected but does not start cutting (busy or paused)

Hi, I bought a Neje Master 2 recently, and I have some problems with it. After assembling, I wanted to try out the Neje software, but it does not connect to my machine, I tried the laser grbl software, and it didn’t work to. After a time, i found the lightburn software. With this, i could connect my machine, but when i want to start cutting, it says that my machine is busy or paused, and doesn’t start cutting. I mention that, it says that my machine is connected, but i can’t even use the arrows to move the machine. If somone could help me, or this happend to somone else, and he fixed it, your tips would help me a lot! Thanks for your help anticipated!