Wiring outdoor outlet to switch to outlet! Need some help!

[kingofthenorth]

Hello! First time homebuyer. Looking to put up some string lights and need to extend the weather proof outlet I currently have outside. My plan is to have switch that controls the extended switch. It doesn't matter that the switch controls the entire outlet as there will only be one thing plugged in. Here is my current setup that didn't seem to work. It's either wired incorrectly or I just have a bad connection. Here is my schematic of what I currently have. Thanks for any suggestions and your time.

 

[Irv]

I believe the ground screw on the GFI should be connected to the ground wire in the supply from the house. If I were doing this, I would replace the original (left) outlet with the GFI, so that anything added after that would be protected.