Problem with replacing igniter in Gas stove sealed burner?

Hi

I have a Whirlpool gas freestanding range with sealed burners

I need to replace a burner igniter. I unscrewed the burner and popped the old igniter out.

I have the new igniter however am not sure how to secrure it back into the burner. I press the igniter into the burner however it doesn't stay in the burner!!??

Am I supposed to crazy glue or epoxy the igniter in place?

Or is there a trick to pressing the igniter into the burner?

Thanks James

IF you want for reference on the sears web site

The Model is

SF385PEEQ0

and the parts are

IGNITER, BURNER, RIGHT FRONT 3186482 3C

BURNER, 9,500 BTU (LF, LR, RF) 3186397 4

you can also view the diagram from the web site.