Went into a debug world to check out the textures... love what you did for the double stone slabs Phnix
Thanks! The half-slab textures were Athesiel's idea, one of the developers. She decided to do this in an attempt to create far more building style variations. This also includes the use of mushroom blocks!
Okay, then it should be working. As soon as the Region Map has been transferred into your hotbar, walk up to Mum. Try standing right in front of her for around 10 seconds to ensure it's not redstone lag on your end.