Cannot view public folders in Exchange 2007 with my domain admin account unless I give everyone group permissions

Since implementing an exchange 2007 server  to our exchange 2003 environment, I cannot view public folders under my domain admin account unless I give everyone group permissions.

The exchange 2003 server is still running in the environment, but all mailboxes and public folders have been moved and it is no longer running anything but I'm just keeping it intact until I verify everything on exchange 2007 works fine.

For some reason, I can view the public folders in OWA though... Very strange.

Thoughts?