If you have an X3 or X2 CPU, the unlocker feature would attempt to active those cores and thus allow you to have an X4. Since you have an X4 though, there are no extra cores to unlock -_-. You will have to overclock using the FSB (which isn't really an FSB but anyway). You will have to lower your RAM multiplier, lower the HT link multiplier, loosen your memory timings, and go from there. Read a Phenom II overclocking guide.