Also, with a new machine or one where the 3pt has not been used, unless there is some mass on it, it may not lower on its' own. When I got my BX, the arms would not drop. The arms drop by gravity and are only lifted by fluid flow. The speed is just an orifice bleed hole control.
With my little guy, I stood on one and moved the lever. Then it went down. I worked it a few times and it then freed up enough to moved on its' own weight. I think the factory paint 'locked it' like it does with that first oil and HST filter.
So do not feel bad you did not 'have teh answer'. I had called my dealer when mine did not move, they explained it to me. Sort of like waking up in the AM, takes a bit to get moving.....