Non - Physics collision System

OK, so I have a cube using the new physics 2D toolset in Unity 4.3 and I control it using vector2 and transform and I have it line cast to detect if their is an object to the sides, front, and back. That works but when it detects an object on the solid layer I can't figure out how to make the player stop moving. Here is my script. #pragma strict

 var speed : float;    //speed of the player
 var PosH : float;    //value of change in the Horizontal axis of the controller    
 var PosV : float;    //value of change in the Vertical axis of the controller
 var bullet : Rigidbody2D;    //Projectile being shot has a Rigidbody2D component
 var GunPoint : Transform;    //Point at the tip of the gun where the bullet is instantiated
 var bulletspeed : float;    //Constant speed the bullet goes
 var facing: Vector3 = new Vector3(0.0f, 1.0f, 0.0f); //default to facing "up"
 var deadzone: float = 0.1;
 //
 var Right : boolean = false;
 var Left : boolean = false;
 var Up : boolean = false;
 var Down : boolean = false;
 //
 var RightT : Transform;
 var LeftT : Transform;
 var UpT : Transform;
 var DownT : Transform;
 //
 
 function FixedUpdate(){
 if ( Mathf.Abs(PosH) > deadzone || Mathf.Abs(PosV) > deadzone) {
     facing = new Vector3(PosH, PosV, 0.0f);
     facing.Normalize();
 }
 //
 Right = Physics2D.Linecast(transform.position, RightT.position, 1 << LayerMask.NameToLayer("Solid"));
 Left = Physics2D.Linecast(transform.position, LeftT.position, 1 << LayerMask.NameToLayer("Solid"));
 Up = Physics2D.Linecast(transform.position, UpT.position, 1 << LayerMask.NameToLayer("Solid"));
 Down = Physics2D.Linecast(transform.position, DownT.position, 1 << LayerMask.NameToLayer("Solid"));
 //
 PosH = (Input.GetAxis("Horizontal"));
 PosV = (Input.GetAxis("Vertical"));    
 
 gameObject.transform.position.x = gameObject.transform.position.x + speed * PosH;
 gameObject.transform.position.y = gameObject.transform.position.y + speed * PosV;
 gameObject.transform.LookAt(transform.position + Vector3(PosH, PosV, 0.0), Vector3.forward);
 gameObject.transform.rotation.y = 0;
 gameObject.transform.rotation.x = 0;
 
 if(Input.GetAxis("TriggerRight") > 0){ 
     Shoot();
     }
 }
 
 function Shoot(){
     var bulletInstance = Instantiate(bullet, GunPoint.position, Quaternion.Euler(facing));
     bulletInstance.velocity = facing * bulletspeed;
     Destroy (bulletInstance.gameObject, 1);
 }