sqlplus v. OCI v. OCCI connect

$ sqlplus smiller/mill99_at_oradev

A OTL based program which uses smiller/mill99_at_oradev as a connection string connects to Oracle.
A working OCI program here which was gutted to use user=smiller, password=mill99, db=oradev connects to Oracle.

But an OCCI program with this code:

     52   Environment* const env = Environment::createEnvironment(
     53     Environment::DEFAULT);
     54
     55   // Open a connection to the database, then close it.
     56   //
     58   try
     59   {
     60     Connection* const con = env->createConnection(user, pass,

throws on line 60 giving:

Can't connect: ORA-01017: invalid username/password; logon denied

What in the heck is the deal with OCCI? My OTL code worked the first time, no problem. I guess OTL is based on OCI, which works How is connecting to the db with OCCI so different from OCI, OTL, sqlplus? How can I fix this error?

tnsping oradev gives:

 $ tnsping oradev

TNS Ping Utility for Solaris: Version 10.2.0.3.0 - Production on 30- APR-2009 19:11:28 Copyright (c) 1997, 2006, Oracle. All rights reserved.

Used parameter files:

Used TNSNAMES adapter to resolve the alias Attempting to contact (DESCRIPTION = (ADDRESS_LIST = (ADDRESS =
(PROTOCOL = TCP)(HOST = sundev16)(PORT = 28538))) (CONNECT_DATA =
(SERVICE_NAME = oradev.bloomberg.com)))
OK (10 msec) Received on Fri May 01 2009 - 01:14:59 CEST