Error when showing thumbnails: warning: file_get_contents() ...

Hi there,

I get this warning when I try to display the thumbnails for the page and block that links to videos:

warning: file_get_contents() [function.file-get-contents]: WARNING: URL fopen access in .../sites/all/modules/emfield/contrib/video_cck/providers/vimeo.inc on line 219.

Video works fine, and the thumbs show up, but I'm wondering how the heck to fix this error message. I saw a similar post from 11 weeks ago: http://drupal.org/node/353757

Unfortunately, I don't get what that means (even after Googling for awhile.) Any help appreciated.

Cheers,
Kevin