Hi, have a model JGBP29WEJ WW oven. The top

Hi, have a model JGBP29WEJ WW oven. The top burners and Broiler work but regular(bottom)oven will not light. I've tried to light the oven with the gas shut off valve in both positions and with a flame directly to the burner. The only other detail I have is you can hear the/a click (Sounds like a relay or something)when you push the start button which we always heard anyway. That's about it. Thank you Wes