Apparently, your phone is unlocked, or Love wouldn't have worked either, and you'd be holding a brick instead of a phone. Lucky you. If you don't know what I'm talking about, you have some serious reading to do before you try and flash that thing again, unless you like the idea of bricking your expensive toy.
Your phone is probably just one of the many that are picky about the RUU tool being used to flash. Try MUN's RUU, it will work every time. Just drop the other .nbf file into it, rename it nk.nbf if needed, and you're off to the races.