Make sure the battery door is fully closed and secured. Try installing the usb cable and plug it in. (with batteries installed, obviously). Do you have 2 pairs of batteries charged fully on an external charger? Click the fire bar 5 times a couple times. If still not working, try contacting the store you bought it from and ask for an exchange. I have had 2 Aliens over a year now, and both have worked flawlessly. Good luck, and welcome to VU. Also, not to be a jerk, but make sure the batteries are installed in the correct orientation...