I had the same problem and fixed it with some Liquid Nails the Joe Jr found lying around Joe's Garage.
Something you might want to do is remove the entire aluminum strip and carefully shave/grind a couple of mm off one end. It seems to be just a hair long for the depression it sits in.
Something else you'd want to do is remove the entire trim piece from the car before attemptin a self-repair. This way you can clamp it down until it dries...