Alright, once i have been unlocking bootloader on p760 and i was succesful from first try. But i did this after i've reflashed kdz threw lg support tool, because i,ve got security alert. I wanted to flash cyanogen mod, and after flashing, i've got security alert. so i reflashed kdz with support tool and after that i succesful unlocked bootloader by adb unlock. so i'm wondering.. maybe we need first to get security error, when fix it and after that try to unlcok? anyone, who got unlocked, have you ever got security error?