Microsoft Word and Power Point Disabled

I have an iMac with MAC OSX Lion 10.7.2.

As of last week, my Word and Power Point applications are both disabled. When I click on the icons, I receive this message:

"You can't open the application Microsoft Word because PowerPC applications are no longer supported."

And both applications have a big X thru the icon.

I have both applications on my MacBook Pro and nothing has happened to those applications, they are operating fine.

What happened???

Message was edited by: ridgwaymountaineer I just read several threads on this same topic. So I now know the problem and the solution. Thanks!