isql无法登陆数据库

inhance

我在服务器上用isql无法登陆数据库
$ isql -Usa -P -Swgsybase
The context allocation routine failed when it tried to load localization files!!
One or more following problems may caused the failure

Your sybase home directory is /u/sybase. Check the environment variable SYBASE i
f it is not the one you want!
Using locale name "C" defined in environment variable LANG
An error occurred when attempting to allocate localization-related structures.
我估计是服务器配置文件的问题，因为我用其他机客户端都可以正常连接数据库。服务器的环境变量是这样的：
$ set
HOME=/u/sybase
HZ=100
IFS=

LANG=C
LD_LIBRARY_PATH=/usr/sybase/ASE-12_5/lib:/usr/sybase/OCS-12_5/lib:/usr/lib:/usr/
sybase/SQLRemote/lib:
LOGNAME=sybase
MAIL=/var/mail/sybase
MAILCHECK=600
OPTIND=1
PATH=/u/sybase/ASE-12_5/bin:/u/sybase/ASE-12_5/install:/usr/bin:/usr/sbin:/u/syb
ase/OCS-12_5/bin
PS1=$
PS2=>
SHELL=/bin/sh
SYBASE=/u/sybase
SYBASE_ASE=ASE-12_5
SYBASE_EJB=EJB-12_5
SYBASE_FTS=EFTS-12_5
SYBASE_OCS=OCS-12_5
SYBASE_SYSAM=SYSAM-1_0
TERM=ansi
TZ=PRC
请问应该怎样修改呢？