Hi Julien,
What is the exact version of jConnect and the JDK used?
For jConnect you can run java -jar jconn4.jar from its location.
Also, please post the CLASSPATH
I used:
java version "1.6.0_23"
Java(TM) SE Runtime Environment (build 1.6.0_23-b05)
Java HotSpot(TM) Client VM (build 19.0-b09, mixed mode, sharing)
jConnect (TM) for JDBC(TM)/7.07 SP100 (Build 26846)/P/EBF20990/JDK 1.6.0/jdbcmain/OPT/Wed Apr 24 11:30:54 PDT 2013
jconn4.jar is first in the CLASSPATH:
C:\sybase\sdk\syb157\jConnect-7_0\classes\jconn4.jar;.;C:\java\jdk\jdk1.6.0_23\jre\lib\rt.jar;C:\java\jdk\jdk1.6.0_23\jre\lib\charsets.jar;C:\sybase\sdk\syb157\jConnect-7_0\classes\jconn4.jar;C:\java\jdk\jdk1.6.0_23\lib;C:\java\jdk\jdk1.6.0
_23\lib\dt.jar;C:\sybase\sdk\syb157\jConnect-7_0\classes;C:\java\j2ee1.5\lib\j2ee.jar
Test runs :
java TestCase
Big5
Big5-HKSCS
EUC-JP
EUC-KR
GB18030
GB2312
GBK
IBM-Thai
IBM00858
IBM01140
IBM01141
IBM01142
IBM01143
IBM01144
IBM01145
IBM01146
IBM01147
IBM01148
IBM01149
IBM037
IBM1026
IBM1047
IBM273
IBM277
IBM278
IBM280
IBM284
IBM285
IBM297
IBM420
IBM424
IBM437
and more.....
Running this from Windows 7 x64
Cheers,
-Paul