Can I use oracle client 10g express to work on oracle 11g database

Question

I have installed an oracle DB 11g, I also installed oracle client 10g express edition to create users and tables. I noticed that the users I created can't connect to db with error message "Error java.sql.SQLException: ORA-01017: invalid username/password; logon denied" and tables I created can't access from my program. I get error message "Error java.sql.SQLException: ORA-00942: table or view does not exist". I start to suspect that client 10g express edition can't use with oracle 11g. Please help.
any suggestion is appreciated.
Thanks,
-- Allen --

Answer 1

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.
C:\temp>cd \oracle\app\oracle\product\10.2.0\server\BIN
C:\oracle\app\oracle\product\10.2.0\server\BIN>
C:\oracle\app\oracle\product\10.2.0\server\BIN>cd \temp
C:\Temp>set ORACLE_HOME=C:\oracle\app\oracle\product\10.2.0\server
C:\Temp>set ORACLE_SID=XE
C:\Temp>set PATH=%ORACLE_HOME%\bin;%PATH%
C:\Temp>type C:\oracle\app\oracle\product\10.2.0\server\NETWORK\ADMIN\tnsnames.o
ra
XE =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = FCC003L)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = XE)
TEST =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = FCC003L)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = TEST)
ORA11B =
  (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST = LAB2)(PORT = 1521))
    (CONNECT_DATA =
      (SERVER = DEDICATED)
      (SERVICE_NAME = ORA11B.example.com)
EXTPROC_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
    (CONNECT_DATA =
      (SID = PLSExtProc)
      (PRESENTATION = RO)
ORACLR_CONNECTION_DATA =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
    (CONNECT_DATA =
      (SID = CLRExtProc)
      (PRESENTATION = RO)
C:\Temp>sqlplus system/oracle@ora11b
SQL*Plus: Release 10.2.0.1.0 - Production on Thu Jul 3 18:26:14 2008
Copyright (c) 1982, 2005, Oracle.  All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.1.0.6.0 - ProductionWith the Partitioning, Oracle Label Security, OLAP, Data Mining,
Oracle Database Vault and Real Application Testing options
SQL> exit
Disconnected from Oracle Database 11g Enterprise Edition Release 11.1.0.6.0 - Pr
oduction
With the Partitioning, Oracle Label Security, OLAP, Data Mining,
Oracle Database Vault and Real Application Testing options
C:\Temp>