unity 2D C# coding problem

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C#

controller

Unity3D

hi there i have a problem with my 2d character again...i fixed my previous problems but the new problem is that,that i cant make my character punchin...he walks,he jumps pretty well but i'm in some problem with punchin movement or anything like this...i made a punch animation and i made a transation to the idle and from idle to puch in the animator window...and also i made a trigger parameter but my code dosent work...may be the code i wrote is completley worng...if thats wrong please tell me what shout id do? thanks

using UnityEngine;
using System.Collections;

public class ScrorpionControllerScript : MonoBehaviour 
{
	public float maxSpeed = 10f;
	bool facingRight = true;

	Animator anim;

	bool grounded = false;
	public Transform groundCheck;
	float groundRadius = 0.2f;
	public LayerMask whatIsGround;
	float jumpTime, jumpDelay = 0.2f;
	bool jumped;
	float punchTime, punchDelay = .5f;
	bool punch;


	// Use this for initialization
	void Start () 
	{
		anim = GetComponent<Animator> ();
	}
	
	// Update is called once per frame
	void FixedUpdate () 
	{
		grounded = Physics2D.OverlapCircle (groundCheck.position, groundRadius, whatIsGround);
		anim.SetBool ("Ground", grounded);

		anim.SetFloat ("vSpeed", rigidbody2D.velocity.y);

		anim.SetBool ("Ground", grounded);

		float move = Input.GetAxis ("Horizontal");

		anim.SetFloat ("wa", Mathf.Abs (move));

			rigidbody2D.velocity = new Vector2(move * maxSpeed, rigidbody2D.velocity.y);

		    if(move > 0 &&! facingRight)
			Flip ();
		    else if (move < 0 && facingRight)
			Flip ();
	}

	void Update()
	{
		if(Input.GetKeyDown (KeyCode.Space) && grounded)
		{
			rigidbody2D.AddForce(transform.up * 275f);
			jumpTime = jumpDelay;
			anim.SetTrigger("Jump");
			jumped = true;
		}
		jumpTime -= Time.deltaTime;
		if (jumpTime <= 0 && grounded && jumped) 
		{
	    	anim.SetTrigger ("Land");
			jumped = false;
		}
		if (Input.GetKeyDown (KeyCode.R));
		{
			punchTime = punchDelay;
			anim.SetTrigger("punch");
			punch = true;
		}
	}

	void Flip()
	{
		facingRight = !facingRight;
		Vector3 theScale = transform.localScale;
		theScale.x *= -1;
		transform.localScale = theScale;
	}
}