Anyone had problems with no sound on Fisher Price Laugh & learn apps on iphone. I have a 3GS iphone that I don't use anymore since I upgraded to the samsung Galaxy 3 so I bought one of those Apptivity Monkeys for DS to put the iphone in. Looks great but I downloaded the some of the apps and can't get sound on all of them. Anyone know a fix?? Would like to sort it out before Christmas so it's ready to go Christmas morning.