Dear Minning,
It was my understanding that Amazon Web Services were fixed in this version; however, the only Amazon info being shown are book covers in OPAC search results. (No cover images on item detail pages, no reviews, nothing on the staff interface, etc.)
This was fixed in commit
http://git.koha.org/cgi-bin/gitweb.cgi?p=Koha;a=commit;h=719280216fd85fc9256...
Which was in 3.0.4. So I suspect that by populating your database with an old backup you have wiped out the new syspref.
If you jump into mysql and the koha database and run INSERT INTO `systempreferences` (variable,value,explanation,options,type) VALUES('AWSPrivateKey','','See: http://aws.amazon.com','','free');
Then you should have the syspref available to be filled in.
you clearly need to do the fix suggested by Chris Cormack But if you still have problem, checks also this fix done after 3.0.4 release: http://git.koha.org/cgi-bin/gitweb.cgi?p=Koha;a=commit;h=e9a02522d8254f8d16f... I suggest also this modification: http://lists.koha.org/pipermail/koha-patches/2009-December/004934.html But fot the last I'm not sure it is useful for your situation. Bye Zeno Tajoli