here is what i know

this is the error one more time

GT::SQL::Relation (525): Unknown method '_is_pk' called at
/home/sites/site31/web/cgi-bin/admin/GT/SQL/Display/HTML/Table.pm line 238.

_is_pk is a sub in GT/SQL/Table.pm

the following lines are in Relation.pm use GT::SQL::Condition;
use GT::SQL::Base;
use GT::SQL::Table;