Thermador Professional Oven not igniting or staying lit

Oven Repair (including Ranges and Cooktops)
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My Thermador Pro natural gas oven will not light. I replaced the spark ignitor in the oven itself but it still does not spark or light the gas. I can manually light the oven but then it shuts off after 30 or so seconds. Do I need to replace the spark module in the back of the range? I am concerned if I replace it that I will still have a gas supply problem. All top burners and broilers work perfectly. Thanks.