Rebuilding Intermedia Index for Task Names Error

Hai Experts,

   when i run Rebuilding Intermedia Index for Task Names it ends with error.error follows

CRM Foundation: Version : 12.0.0

JTFTKIMD module: Rebuilding Intermedia Index for Task Names
+---------------------------------------------------------------------------+

ORA-20000: Oracle Text error:
DRG-11422: linguistic initialization failed
DRG-11
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Start of log messages from FND_FILE
+---------------------------------------------------------------------------+
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End of log messages from FND_FILE
+---------------------------------------------------------------------------+

Finished executing request completion options.

+---------------------------------------------------------------------------+
Concurrent request completed
Current system time is 06-DEC-2012 18:12:33

+---------------------------------------------------------------------------+

Thanks in Advance,

Saravanan V