Cool Dryer

My dryer starts and works fine for a while. After a few minutes, the flame goes out but it keep tumbeling. The igniter glows periodically but the flame does not come on.

I have replaced the flame sensor and the Dryer ignitor but it continues to do the samething. The Igniter that I replaced failed the continuity test and I thought that I had found the problem.

Can you Help?:cool:

Mario