public synonym for private dblink

@cr_dblink_opnsutil_tflt2_rev

 Hi folks

I've just excuted this

SQL> @cr_dblink_opnsutil_tflt2_rev.sql
SQL> set linesize 200
SQL> conn opnsutil
Enter password:
Connected.
SQL>
SQL> create database link
  2  RTAG.WORLD
  3  connect to &remuser identified by &rempwd using 'ge_tflt1';
Enter value for remuser: rapidtag_admin
Enter value for rempwd: rapidtag_admin
old   3: connect to &remuser identified by &rempwd using 'ge_tflt1'
new   3: connect to rapidtag_admin identified by rapidtag_admin using 'ge_tflt1'

Database link created.

SQL>
SQL> create or replace public synonym "RTAG.WORLD" for RTAG.WORLD;

Synonym created.

but the public synonym it's not working at all