Problem dragging contacts into numbers

Hello all, and I hope you can help. I'm a relative newbie to the forums (other than lurking occasionally), but quite an experienced Mac user.

I am trying to get contacts into a spreadsheet. I have tried the two methods of (1) dragging individual contacts from Contacts or groups into a table with mapped column names, and (2) dragging contacts or groups onto a blank area of canvas, in Numbers 09. Neither works. Nothing happens.

Can anyone suggest where I'm going wrong?

I'm on Mac OS X 10.8.4 with all software up-to-date.

Thanks in advance,

Keith