runkeeper and myfitnesspal

Good morning (or afternoon, or evening :) )

I recently caved into the 21st century and got a smartphone. I have the myfitnesspal app on there, and I just added run keeper. Are these two supposed to sync so that my data from run keeper is added to the cardio section of myfitnesspl? I have the two apps connected, but nothing has gone from run keeper to myfitnesspal.