ERROR: It is not possible to invoke an expression of type 'float'.

totally stumped by this error... I know its gotta be something simple i just cant see it.\

 #pragma strict
 
 var sounds : AudioSource[];
 var nextShot : float;
 var shootSpeed : float;
 
 function Start () 
 {
     sounds = gameObject.GetComponents.<AudioSource>();
 }
 
 function Update () 
 {
     nextShot+=Time.deltaTime(); //error here
     if(nextShot>shootSpeed)
     {
         nextShot=0;
         Debug.Log("PEW");
     }
 
 }

the error is: BCE0077: It is not possible to invoke an expression of type 'float'.