Laser fires but doesn't move

Just got an inexpensive Two Trees mini laser. Problem is the laser fires just fine but doesn’t move on X Y axis. I’ve been using Lightburn for over a year now with my CO2"s, so I have some experience with the software. If I try to jog it seems like the motors engage but don’t move the gantry, or if I try to jog twice in the same direction the gantry “twitches” in one direction then back. If I try to run a cut the laser fires but doesn’t move. It’s really confusing. Any ideas appreciated.