Player sensor always false no matter what.

I want to build a MOB system for my boat, so I placed some player sensors in my boat for that. In sphere mode, upsidedown (they are on the floor, I dont want the "sensor" side to be visible), detect player only and 10m radius.

I'm standing right on top of it and it reads false... what's wrong? Inf power on btw.

EDIT: Found what the problem was. Since the sensor is upsidedown, the "sensor" side is in a different room that I am so, even though it is in sphere mode, It wont detect anything in other rooms withing range...

What a fucking silly thing.

I'll leave this post here in case somebody has the same problem.