Why is my shaving gel not coming out of the can?

Okay so recently I bought the Gillette Satin Care Shaving Gel and I was about to use it so I pressed the button thingo but little to nothing is coming out. I'm sure there is something inside because it feels slightly heavy and it is brand new. I've been trying to use it in the shower before I shave but why isn't it coming out? I've tried shaking it and still nothing comes out. What should I do?