导数据 居然导不出来了！！oracle+linux

Connected   to:   Oracle9i   Enterprise   Edition   Release   9.2.0.4.0   -   Production
With   the   Partitioning,   Real   Application   Clusters,   OLAP   and   Oracle   Data   Mining   options
JServer   Release   9.2.0.4.0   -   Production
Export   done   in   US7ASCII   character   set   and   UTF8   NCHAR   character   set
server   uses   ZHS16GBK   character   set   (possible   charset   conversion)
Note:   indexes   on   tables   will   not   be   exported

About   to   export   specified   users   ...
.   exporting   pre-schema   procedural   objects   and   actions
.   exporting   foreign   function   library   names   for   user   DM  
.   exporting   PUBLIC   type   synonyms
EXP-00008:   ORACLE   error   6552   encountered
ORA-06552:   PL/SQL:   Compilation   unit   analysis   terminated
ORA-06553:   PLS-553:   character   set   name   is   not   recognized
EXP-00000:   Export   terminated   unsuccessfully


各位大哥这要怎么解决啊！

------解决方案--------------------
character set name is not recognized

存在不可識別的字段
------解决方案--------------------
数据库字符集不可识别?
数据库字符集改过拉?还是用中文作为字段名拉?