Problem with Photo Gallery Using XML and Flash

hello, first post, so hey to everyone!.

im using a tutorial from the flash kirupa website

i have completed my gallery and when i preview it i get an ‘undefined’ message in the description text field and the image position text field displays ‘1/0’,
when i preview the supplied tutorial fla file i get the same message too.
i have my images.xml and images folder in the same directory as the swf
and they’re linked correctly.

im using flash8 on a mac.

thanks for any help or info on how to get it working.