System Lockdown Configuration Issue

I'm trying to set up System Lockdown on our SEP 12.1.2 server, and am using HOWTO81094 for guidance. I've created file fingerpint list using checksum. However, when I try to import the list in the options for System Lockdown (under Approved Applications), I am unable to add the list. When I click on Add, I get an error saying..."There are no file fingerprint lists available to add". Any ideas why this is happening? Thanks!