Now I re-checked it. I took the original rulesmd.ini, and sounds RobotTankOnline and RobotTankOffline reproduced normally. After I removed the line in rulesmd.ini PowersUnit=ROBO, and a string PoweredUnit=yes replaced the PoweredBy=GAROBO, then EVA not play sounds RobotTankOnline and RobotTankOffline.
Now I re-checked it. I took the original rulesmd.ini, and sounds RobotTankOnline and RobotTankOffline reproduced normally. After I removed the line in rulesmd.ini PowersUnit=ROBO, and a string PoweredUnit=yes replaced the PoweredBy=GAROBO, then EVA not play sounds RobotTankOnline and RobotTankOffline.