Sphere casting a wall always returns false?

Hello, My 2d platformer character keeps on getting stuck on the walls while in midair. I tried to solve this by setting player velocity to zero upon a sphere cast hitting the wall. However I am new to ray casting and I can't seem to be able to get the sphere cast to return true.

I have a game object called frontSide that I draw a sphere cast from the transform.position of my player. If anyone could help me figure out why my sphere cast always returns false that would be greatly appreciated.

Code:`using UnityEngine; using System.Collections;

public class PlayerMovement : MonoBehaviour {

 public bool facingRight = true;
 public bool jump = false;

 public float horizVel = 0f;
 static Vector3 mirrorX = new Vector3(-1,1,1);

 public float moveForce = 300f;
 public float maxSpeed = 10f;
 public float jumpForce = 1000f;

 private Animator animator;
 private bool grounded = false;
 private Transform groundCheck;
 private Transform frontSide;

 private bool sideCheckLeft;
 private bool sideCheckRight;

 private RaycastHit hitL;
 private RaycastHit hitR;

 // Use this for initialization
 void Awake () {
     animator = GetComponent<Animator>();
     groundCheck = transform.Find ("groundCheck");
     frontSide = transform.Find ("frontSide");
 }
 
 // Update is called once per frame
 void Update () {
     grounded = Physics2D.Linecast (transform.position, groundCheck.position, 1 << LayerMask.NameToLayer ("ground"));
     sideCheckLeft = Physics.SphereCast (transform.position, 2.0f , frontSide.position, out hitL, 100, 1 << LayerMask.NameToLayer ("ground"));
     //sideCheckRight = Physics.SphereCast (transform.position, 2.0f, Vector3.right, out hitR, 2, 1 << LayerMask.NameToLayer ("ground"));

     if (Input.GetButtonDown ("Jump") && grounded)
         jump = true;

     print (sideCheckLeft);

     if (sideCheckLeft)
 //        rigidbody2D.velocity.x = 0f;
         print ("hit");

     Debug.DrawLine(transform.position, frontSide.position, Color.red);

 }

 void FixedUpdate (){
     float h = Input.GetAxis ("Horizontal");

// animator.SetFloat ("Speed", Mathf.Abs (h));

     horizVel = Mathf.Clamp(h*(moveForce/rigidbody2D.mass)*Time.deltaTime, -maxSpeed, maxSpeed);

     Vector3 vel = rigidbody2D.velocity;
     vel.x = horizVel;
     rigidbody2D.velocity = vel;

     if ( (h<-0.01f && facingRight) || (h>0.01f && !facingRight) ){
         transform.localScale = Vector3.Scale(transform.localScale, mirrorX);
         facingRight = !facingRight;
     }

     if(jump)
        rigidbody2D.AddForce(new Vector2(0f, jumpForce));
        jump = false;
 }

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

     facingRight = !facingRight;
 }

}`

This is a picture of my setup: http://imgur.com/kNRiaPW