LG Optimus L9 p768g Security Error

Hello, I've been trying to find a fix everywhere but I've had no luck. As soon as I power on my LG Optimus L9 p768g it goes into SECURITY ERROR. I've tried with the LG MOBILE SUPPORT TOOL but it won't recognize the phone through the USB. I've tried with different USB cables and neither of them work. Downloaded the usb drivers... nothing. Tried the power+volume down+home button and goes into recovery mode (with the android robot thingy) and as soon as it restarts the phone it goes immediately into that annoying SECURITY ERROR.:crying: HAAALP!