Bradbryant.dhs,
Where are you creating the new admin user who should have access to ACS web gui under internal users or administration.
Internal user and ACS administrator accounts are completely different.
Adding administrator account
http://www.cisco.com/c/en/us/td/docs/net_mgmt/cisco_secure_access_control_server_for_windows/4-2/user/guide/ACS4_2UG/Admin.html
Regards,
Jatin Katyal
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~Jatin