Multiple Root Contexts

Here is my setup: FreeBSD 4.11 server with FreeRADIUS 1.0.4 authorizing/authenticating users in an eDirectory Tree on a NetWare 6.5 server. My issue: There are three root contexts in the tree. If I set the basedn to context1, I can successfully authorize/authenticate users in context1, but I need FreeRADIUS to search all three contexts for users, and I can't figure out a way to add all three as a basedn at the same time. Thanks in advance, Josh