Error : ORA-28545: error diagnosed by Net8 when connecting to an agent

Question

I try to connect my Oracle 11.2 database to SQL server 2012. I installed Oracle Gateway on a window 2012 R2 and followed Oracle Gateway configure instruction.
Here is the initdg4msql.ora
# HS init parameters
HS_FDS_CONNECT_INFO=ctmcsql2012.dot.state.co.us:1433/CTMCSQLSVR12/external
HS_FDS_TRACE_LEVEL=OFF
HS_FDS_TRANSACTION_MODEL=READ_ONLY
HS_DB_NAME=external
HS_DB_DOMAIN=ITS.DOT.STATE.CO.US
LISTENER.ORA
SID_LIST_LISTENER =
(SID_LIST =
   (SID_DESC =
(SID_NAME=PLSExtProc)
(ORACLE_HOME=D:\product\11.2.0\tg_1)
(PROGRAM=extproc)
   (SID_DESC =
(SID_NAME=dg4msql)
(ORACLE_HOME=D:\product\11.2.0\tg_1)
(PROGRAM=dg4msql)
LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = CTMCSQL2012.dot.state.co.us)(PORT = 1521))
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1521))
ADR_BASE_LISTENER = D:\product\11.2.0\tg_1
TNSNAMES.ORA
EXTPROC_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
    (CONNECT_DATA =
      (SID = PLSExtProc)
      (PRESENTATION = RO)
dg4msql.its.dot.state.co.us =
   (DESCRIPTION=
     (ADDRESS=(PROTOCOL=tcp)(HOST=ctmcsql2012.dot.state.co.us)(PORT=1521))
    (CONNECT_DATA=
      (SID=dg4msql))
    (HS=OK)
lsnrctl status output:
PS D:\product\11.2.0\tg_1\bin> lsnrctl status LISTENER
LSNRCTL for 64-bit Windows: Version 11.2.0.1.0 - Production on 23-APR-2015 14:26:54
Copyright (c) 1991, 2010, Oracle.  All rights reserved.
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=CTMCSQL2012.dot.state.co.us)(PORT=1521)))
STATUS of the LISTENER
Alias                     LISTENER
Version                   TNSLSNR for 64-bit Windows: Version 11.2.0.1.0 - Production
Start Date                21-APR-2015 16:00:11
Uptime                    1 days 22 hr. 26 min. 42 sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   D:\product\11.2.0\tg_1\network\admin\listener.ora
Listener Log File         d:\product\11.2.0\tg_1\diag\tnslsnr\CTMCSQL2012\listener\alert\log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=CTMCSQL2012.dot.state.co.us)(PORT=1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC1521ipc)))
Services Summary...
Service "PLSExtProc" has 1 instance(s).
  Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "dg4msql" has 1 instance(s).
  Instance "dg4msql", status UNKNOWN, has 1 handler(s) for this service...
The command completed successfully
I copied TNS entry to the database TNSNAMES.ora and created a DB link and get error:
CREATE DATABASE LINK "EXTERNAL.ITS.DOT.STATE.CO.US@CODOT"
CONNECT TO "CoDOT"
IDENTIFIED BY <PWD>
USING 'dg4msql.its.dot.state.co.us';
Link : "EXTERNAL.ITS.DOT.STATE.CO.US@CODOT"
Error : ORA-28545: error diagnosed by Net8 when connecting to an agent
Unable to retrieve text of NETWORK/NCR message 65535
ORA-02063: preceding 2 lines from EXTERNAL@CODOT

Answer 1

Check if this helps you - https://community.oracle.com/thread/466786
Pradeep