@StanRobinson – I didn’t have any problems and I have added Facebook Pages for my clients.  I believe you first have to add your Facebook Personal Profile, then your Facebook Pages.  Hope that helps you.

I did have a problem adding one the pages I admin the other day.  I haven’t tried since, but I have quite a few pages already added.  Diane is right, you have to start with your personal page before you can add the fan pages.