User cannot connect to backend system with user J2EE_ADMIN.

I am using Rapid Installer to initiate the second part of the installtion "ERP 6.0 EhP 3 – Self-Service Scenarios and Automatic Roles". When I get to the J2EE User section to enter the parameters, the user is defaulted to "Administrator" and I enter my password. I click next and get this message "User cannot connect to backend system with user J2EE_ADMIN." Any ideas?