Your VI is in LabVIEW 2013, in case you don't know.
I would recommend to start here. There are way too many things wrong with your code, mostly misconceptions.
(Why do you think you need a value property node? Simply connect the LED to the switch. Why do you think you need to poll that switch as fast as the computer allows, millions of times per second, consuming all CPU? How do you stop the VI? You don't see anything because your button is latch action, meaning the LED only goes on for a nanosecond when you press it. Change the machanical action!, slow down the loop with a small wait statement, etc.!)