Add TapGestureRecognizer to Custom Frame

Hi there.
I have a problem when working with TapGestureRecognizer. I have a custom of Frame. Inside custom Frame i add a StackLayout ( inside this StackLayout have few controls ). My code as bellow :

this.GestureRecognizers.Add (new TapGestureRecognizer {
                    Command = new Command (() => {
                    // ....
                    })});

On IOs it work perfect, but on android nothing happen when i tab on custom frame.
Any idea or keywork to help me resolve it?
Thank for your support