root cause:
Oracle code page
The solve way:
Check in Windows registry:
HKEY_LOCAL_MACHINE\SOFTWARE|ORACLE|KEY_OraDb9i_home2
compare NLS_LANG key value with Oracle server's value,they must be the same value.
Detail information:
For Oracle code page detail information , please refer to :
http://download-east.oracle.com/docs/html/B10131_02/gblsupp.htm