I had a trouble after the first time I refilled propane. I ended up calling Coach Net and their tech had me turn off the propane, and then really slowly turn it on. Then try to start the fridge 4-5 times. My fridge only tries to light when it is first turned on -- after that it doesn't try anymore so you have to manually turn it off and back on. If it doesn't like, he said to turn off the propane and start again. He said my issue was air in the lines.
This worked for me. I realize you have a different unit entirely but thought I'd mention it.