Well buddy, welcome to the club. :) if it's DSI, it has no thermocouple, it has a ignitor/sensor.
So, it's an Attwood?
Many of the sources I found recommend checking all the connections. Mine has a sticker right under the electronic module that says the same thing about checking connections. I checked, cleaned and bypassed everything on mine and it wont stay running. I have it narrowed down to the ignitor/sensor and have one on order. It should be here tomorrow. If it's not that then I'm afraid it's my card.
Is it an Attwood?