When you spawn into your new map, everyone's magic box doesn't work, so how did these other map developers make their box work? Please help me! lol

I am also having an issue with the box, don't know if this is the same for everyone who wasn't an alpha tester? It spawns the cement  blocks underneath but the box itself is nowhere to be seen (I've checked the whole sky box and it's not randomly off the map). There are no errors while compiling so I'm hoping someone here can shed some light? TIA