oven lit then stopped lighting/heating

bought a new ignitor. Turned 2pole/220volt circuit breaker (for oven)and also 1pole/120volt(for clock) circuit breaker off at circuit box. Took racks out of oven and used 1/4 socket/ratchet to take bottom of oven off . Took rear old ignitor off(2 screws and wiring/wire nuts) and mounted new ignitor(2 new screws and wire nuts).Turned both circuit breakers "on", then lit oven with new ignitor to make sure it worked.(some take up to 3 minutes to ignite) Re-installed racks and closed oven door.