refridgerator not working on gas

Hi, I need some diagnostic help if anyone has any to offer:



I have a Bambi, Dometic 2351 fridge. Runs fine on electicity, but not firing up on gas. I have:



recycled ignition sequence

replaced 1A inline fuse and 3A circuit board fuse



The gas canister full

The lines are clean (stove and water heater working)

No gas or flame coming into cylinder



Thoughts, oh wise ones?



Thanks

Caroline