Rigidbody not moving with basic script and frozen rotations?

My rigidbody uses gravity,, has mas, is not kinematic,, has frozen rotations, has gravity enabled, the character has a collider and stands on the ground just fine, the terrain has a collider to stand on. I am curious why the following script will not move the character forward or what edits i would need to make in order to have the character move with rotations frozen.

Code (CSharp):

1.         moveHorizontal = Input.GetAxis("Horizontal");
2.        moveVertical = Input.GetAxis("Vertical");
3.  
4.         Vector3 movement = new Vector3(moveHorizontal, 0.0f, moveVertical);
5.  
6.         myrigidbody.AddForce(movement * speedstat);