Planes not moving Thread - GEM 2 Editor Fan club

Hello people. I need some help with a mod I'm making. Its just a copy of the MOWAS default skirmish maps but with all the multiplayer units available. It's almost complete, but now I'm stuck trying to implement the USA bonus (Air Attack). The problem is that my plane doesn't move when I execute an air_attack trigger. I created the plane, put a pilot inside, set it to airborne and created the trigger, but when I test it, the plane just turns toward the waypoiny where I want it to attack, but it doesn't move, it stays frozen in mid air. If I try to direct control it, it doesn't move either. I have to send it a move command (with right click or using a trigger) and then it starts moving. The weird thing is that when I load the original .mi file (skirmish_units(usa).mi), and I try to do the same thing there, the plane starts moving as soon as I execute the air_attack trigger. I don't know what's happening. Can you help me?