Function not responding to GetKeyDown

I am trying to make a first/third person game but when ever i click the key i c or any other key i set it to it doesn’t respond.

#pragma strict

var FPScamera : Camera;
var Tpcamera : Camera;

private var camswitch : boolean = false;

function start()
{
	FPScamera.GetComponent(Camera).enabled = true;
	Tpcamera.GetComponent(Camera).enabled = false;
	}
function update()
{
		if(Input.GetKeyDown("c"))
	{
		camswitch = !camswitch;
	}
		if(camswitch == true)
	{
		FPScamera.GetComponent(Camera).enabled = false;
		Tpcamera.GetComponent(Camera).enabled = true;
	}
	else 
	{
		FPScamera.GetComponent(Camera).enabled = true;
		Tpcamera.GetComponent(Camera).enabled = false;
	}
}

function Start()

function Update()

camelcase