you need to wait until the quest line tells you that you can place it, you can have unlocked all gold coin items but it won't matter until the quest lets you use them
I had the same issue. The towers were in my inventory, but I was unable to unlock them. Once I reached a level 5 or 6 (I don't remember which) I was able to place them.
Apparently the game awards you the castle walls, towers and gates before you reach the level you can place them.
About TSTO Tips & Guides
Share your gameplay tips, how-to's and gameplay guides for The Simpsons: Tapped Out.2,679 PostsLatest Activity: 12 years ago