Hatch problem

[Storfigge]

I have made a room with a hatch in the ceiling. To reach this hatch you need to climb up a ladder. So there a two problems here. First was that i can't seem to open the hatch while I'm climbing the ladder. My solution was to just keep the hatch open so you just have to go climb through but for some reason that wont work either, i put OpenAmount to 1 but it is still closed. So a solution to any or both of these problems would be nice.

Is it possible somehow to open hatches while climbing?

Why is the hatch closed even though i have OpenAmount at 1?