I have a Maytag MDG3300AWW gas dryer. With any setting on the cycle dial, the dryer will turn on, drum will spin, the Ignitor heats up and glows with a click, then another click is heard as the gas turns on, then the gas ignites and the flame is good for only about 5 seconds. Then another click is heard as the gas shuts off, and the flame quits, and the ignitor stops glowing. I can wait a few seconds and repeat this over and over. Flame just will not keep burning. Any ideas? Thanks.