Draging Rigid body....for real-time loaded models

Hello Unityrs,

I have an OBJ file which represents my 3D model I load at run time in Unity. Now, I attached it a RigidBody, MeshCollider, and DragRigidbody.js script from Unity package. I dunno why I place my model in 0,0,0, but with the rigidbody, it keeps falling in the scene without interacting with the plane, and in the scene there is also a built-in cube. I can pick and drag the cube but I can't pick and drag my model... This is my code:

var obj; obj = new OBJ();

Camera.main.transform.position = Vector3(0,10,0);

Camera.main.transform.rotation = Quaternion.Euler(90,0, 0);

StartCoroutine(obj.Load(filename));

gObj = obj.obj;

gObj.transform.position = Vector3(0,2,0); //Positioning the object in (0,0,0);

gObj.transform.localScale = Vector3(0.008,0.008,0.008);

gObj.AddComponent(Rigidbody);

gObj.AddComponent(MeshCollider);

gObj.AddComponent(NetworkView);

gObj.GetComponent(Rigidbody).useGravity = false;

gObj.GetComponent(Rigidbody).isKinematic = false;

gObj.AddComponent(DragObject);