Sims Freeplay Problem. (On iPhone 5)?

OK… So I've been playing the game Sims Freeplay for the last 1 month and a half, and its a pretty good game, but I have a problem. My problem is that when I tried to build a building in the town map, it started to build, but after the given time finished, it just stayed there like there was something wrong. When you click on it it shows you something that says: -1 sec, -2 secs, -3 secs and so on and when it gets to 1 min it just starts over, -1, -2, -3… I can't cancel it or do anything. It just says that i can pay 16 LP and nothing else.

Try double clicking your home button, pressing on the apps in the apps bar and when they're shaking, tap the x on the Sims Freeplay app, then close the apps bar and tap on Sims Freeplay again. That should restart the app.

If that doesn't work, google the Sims Freeplay forum and ask your question there.