Hi,
On following the messages; this is what I get from running freeradius -X but before point it to PostgreSQL it runs fine.
<snip>
rlm_sql (sql): Could not link driver rlm_sql_postgresql: rlm_sql_postgresql.so: cannot open shared object file: No such file or directory rlm_sql (sql): Make sure it (and all its dependent libraries!) are in the search path of your system's ld.
fairly straight forward - did you build this server yourself? If so, did you check the output of the ./configure stage? looks like it hasnt built the postgres modules - probably because the required postgres devel package wasnt installed at the time. if this is from a package, check that there isnt some additional part package that provides the postgres functionality - I note that several distros split FR into multiple parts. alan