Bought a MacBook Pro 17" running mac OS Lion 10.7.5. I use iWork a lot, I have the Family Pack, however, after reinstalling from my DVD discs and updating to the most current version, none of the iWork programs launch properly and none can open an existing file nor can they create a new file. Message just says that the cannot be opened. The template chooser doesn't load at startup either. Does anyone know what I'm missing here.