ORA-39097: Data Pump job encountered unexpected error -6508

 I have created datapump directory. Oracle is at 10.2.0.4 version. Still getting error while trying to export through EXPDP.

> expdp system/******* parfile=ecmstg.par

Export: Release 10.2.0.4.0 - 64bit Production on Thursday, 30 July, 2009 12:04:46

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Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
ORA-39006: internal error
ORA-39065: unexpected master process exception in DISPATCH
ORA-04063: package body "SYS.KUPW$WORKER" has errors
ORA-06508: PL/SQL: could not find program unit being called: "SYS.KUPW$WORKER"

ORA-39097: Data Pump job encountered unexpected error -6508

Parfile:

DIRECTORY=TESTDIR