About a year ago I got the sims3 for PC then a month ago I got the sims3 pets...Then last week I got the sims3 Late night..I installed the late night and it worked and I played it then the next time I tried to play it this would come up "No game disc found! Please insert the sims3 pets game disc and when I tried to uninstal the sims 3 pets it wouldnt let me...Please Help me figure this out.. thanks!!!