Rigidbody2D.Velocity = Vector2 not changing X Position

I'm making a fighting game and I trying to apply a knockback when receiving a $$anonymous$$t

T$$anonymous$$s is the problem:

  private void OnTriggerEnter2D(Collider2D Coli)  
         {  
             rigidez.velocity = new Vector2(30.0f, 18.0f);  
             print(Coli.name + "    " + rigidez.velocity.x);  
         }

When I run t$$anonymous$$s, it seems to work fine in everyt$$anonymous$$ng but the force in the X axis, it's launc$$anonymous$$ng upwards and the print says 30 at the rigidez.velocity.x part, but the X position of the object is not changing. And yes, the freeze position isn't checked.