Sims3 only plays on one user profile
I have installed Sims3 on my 2011 iMac 27" and MacBookPro 17" using my (adminsitrator) profile. The problem is my Gandson cannot use it under his profile. I click the icon and it bounces and nothing happens. have tried launching the .exe file from finder but cannot get iot to load at all. I am using Lion 10.7.1 with the latest patches.
I assume it is something to do with permissions but I ain't sure what! Any ideas?
MacBook Pro, Mac OS X (10.6.8)