I installed an original 2009 copy of iWork on a disc onto a new iMac that has Mountain Lion. I enter the activation number on my admin account and it runs and everything okay. But every other user, it presents the screen to "buy or try" again, asking for a serial number. It's like it's not activating for everybody, only the user from which I installed it. It did this on both a new iMac and a brand new Mac Mini. What might be going on here?