From Facebook Developer Wiki

[edit] Photo Uploads for fbPages

Photo Uploads currently do not work for fbPages, the api calls return no response when substituting a page_id for a uid. 1181029451 09:14, 10 November 2008 (PST)

It's a known issue that the photos.* calls don't work with Facebook Pages. See http://bugs.developers.facebook.com/show_bug.cgi?id=942. It's a non-trivial fix, and we don't have an ETA for fixing it at this time. Pete (563683308 18:13, 10 November 2008 (PST))