The pilot will light and stay on as long as the knob is in the pilot position as soon as I turn it to the on position I here a click and it goes out immediately. The flame is the appropriate blue color- not yellow to indicate it needs to be cleaned out. It is touching the thermocouple appropriately as well. We have plenty of gas in the tank and it was working fine for the last 2 months until the pilot just went out spontaneously last week.

Thanks

Thermocouple