Zac Espreso

Hey boys! Recently got this game and loving it, got a server started with mates and got some mods in, with no luck whatsoever we weren't able to find a castle, so I've turned to world edit to bring one to us instead. Problem is, its here, physically, not ghost blocks or anything, and mushrooms and everything is going in the spawn, but I cannot for the life of me actually interact with the place besides just destroying the blocks. I would really like some help please lads,