impdp导入数据无权限ORA-39213错误

oracle@linux:~> impdp tbs/tbs directory=dmpdir dumpfile=20110810.dmp
Import: Release 11.2.0.1.0 - Production on Sat Dec 31 11:36:18 2011
Copyright (c) 1982, 2009, Oracle and/or its affiliates.  All rights reserved.
Connected to: Oracle Database 11g Enterprise Edition Release 11.2.0.1.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
ORA-39006: internal error
ORA-39213: Metadata processing is not available
oracle@linux:~> oerr ora 39213
39213, 00000, "Metadata processing is not available"
// *Cause:  The Data Pump could not use the Metadata API.  Typically,
//          this is caused by the XSL stylesheets not being set up properly.
// *Action: Connect AS SYSDBA and execute dbms_metadata_util.load_stylesheets
//          to reload the stylesheets.
oracle@linux:~> sqlplus /nolog
SQL*Plus: Release 11.2.0.1.0 Production on Sat Dec 31 11:39:51 2011
Copyright (c) 1982, 2009, Oracle.  All rights reserved.
SQL> conn / as sysdba
Connected.
SQL> exec dbms_metadata_util.load_stylesheets
PL/SQL procedure successfully completed.