To resolve the problem, I changed
database character
to UTF8 and can connect and use my application.Connect to SQLPlus as SYSDBA (eg System / Password SYSDBA) and perform the steps below:
SQLPLUS>shutdown immediate
SQLPLUS>startup restrict
SQLPLUS>ALTER DATABASE CHARACTER SET INTERNAL_USE UTF8;
SQLPLUS>shutdown immediate
SQLPLUS>startup
Environment information:
* Oracle version: Oracle XE 10G Universal
* Operating system: Windows XP, NT