I moved my site to the production server, but now the ModelAdmin stuff doesn't work, and I keep getting this error:
[User Error] ModelAdmin::getManagedModels(): You need to specify at least one DataObject subclass in protected static $managed_models. Make sure the visibility of your property is set to "protected"
but the property is already protected!
$managed_models seems to be empty.
Infact, I started from scratch again (fresh install), and did exactly as http://doc.silverstripe.com/doku.php?id=modeladmin
but I keep getting that error...
(server: php 4.16 , MySQL 5.0.45)
On my test environment everything works fine.