supreme commander 2 units wont return fire

After breaking into the Hutt Embassy in Makeb's capital Talaos City, the Republic forces and the Makeb resistance learn of the Ark, an enormous vessel being constructed inside the hollow Giant's Spear mesa that will ferry Toborro, the other Cartel personnel, and their isotope-5 stores off of the planet when the planet begins to break apart. Saresh's forces make contact with Shalim Avesta, leader of the Makeb resistance and the planet's de facto Head of State, and help him rescue his niece Lemda, who is a geophysicist who was captured by the Regulators after she discovered that Toborro's drilling will cause the planet to break apart. Upon learning of the Hutts' actions, Chancellor Saresh consults with the Jedi Order and learns that the Hutts will likely try to continue their conquests if they are not stopped, so she pledges Republic aid to the citizens of Makeb. Toborro therefore pays off Makeb's defense force, the mercenary army known as the InterStellar Regulators, to help the Hutts conquer the world, and the Cartel blockades the Makeb system as Toborro begins to mine the isotope-5 in Makeb's core without any regard for what it would do to the planet.

Isotope-5 is capable of warping electromagnetic and gravitational fields, and a gram of the substance can generate immense amounts of power. Seeing the Empire weakened, Toborro decides to continue Karagga's campaign of expansion, but with the planet Makeb at the heart of a new era of Hutt conquest-for Makeb is home to deposits of the incredibly rare and powerful mineral known as isotope-5. In the wake of Karagga's death, the Hutt Toborro seizes the leadership of the Hutt Cartel, establishing himself as the new Supreme Mogul with Szajin, as his right-hand man.

Supreme commander 2 units wont return fire