Did you download and install the LabVIEW Interface for Arduino from the LabVIEW Tools Network? Do you know how to connect your Sensor and LED to your Arduino? [I haven't installed this Interface, so I get lots of errors when I attempt to open your code -- does the code look "OK" to you?]
Normally, we tell Forum visitors to "Post your code" (Attach your VI). However, if (as in your case) the code involves a lot of functions that we are unlikely to have, a "picture" of the Block Diagram can also be helpful. Try to get as much code as possible in the image, and be sure you are showing the most salient Case Statement option (i.e. don't show the "Close" Case, show the "Doing Something Important" Case).
Bob Schor
