OK, first let me say that I do not have the specs for a 2n222 so my answer is more in general. You do not show what supply voltage the transistor gets but it should have a load resistor, either in the collector or the emitter lead.
Next, try to use a lower value than the 1k5 resistor at the base (or a higher resistance than the 4k7 resistor). Measure the base to emitter voltage with a digital volt meter, it should be less then 0.5V for the transistor to turn off.