Has to jump from pilot to main valve to give gas valve 24 volts

Because pilot flame sensing device (most likely a flame sensor) is not sensing the pilot, therefore not allowing power to the main valve. Either that or a bad ignition module. Don't be jumping the gas valve anymore. You need to have this checked by a qualified tech and have it fixed before you endanger yourself any further. Im assuming you have an intemitant spark/pilot ignition module/control? Something along the lines of either a white rodgers, or honeywell s8--- (fill in the blanks for me.)