Clicking with Shore Power

Got the new convertor installed last week and everything seems to be working fine with the electrical now. Over the weekend I turned the hot water heater on and it seemed to be working fine for a couple of days. We used it to do dishes and take a shower a couple of days leaving the pilot on. Then it stopped working. I have a good pilot light when I turn it all the way to pilot and hold it. As soon as I release it off pilot there is no gas and I can't get the main burner to light. I tried replacing the thermo couple with no change.
Anything else I might be able to check? It seems like as soon as I release it from pilot all gas flow is stopped. I have waited long enough to make cetian the thermo couple is getting hot enough.