DBLookups comfusing "route through server"

I am attempting an @DBLookup from one database to another through a new Domino 8.5.1 server (and a new domain setup). The error I’m getting is “Error connecting to [the server name]. Server error. You are not allowed to route through this server.” Here’s my @DBLookup (DB is the database file name)

ans := @DbLookup(“Notes”:“NoCache”;@Subset(@DbName;-1):DB;“ParentDOCUnids”;@Text(@DocumentUniqueID);“Borrower”;[FailSilent]);

The server is physically on the same box as my developer client (and my notes client). Am I missing something in the admin setup for the server?