oracle export/import error

hi i try to export tables in oracle-9i.
but i got one error message .i cant solve tat problem.
i'm using linux environment.plz help me

coding as follows
-----------------------


/wd/arul>exp

Export: Release 9.2.0.5.0 - Production on Mon Aug 20 23:49:48 2007

Copyright (c) 1982, 2002, Oracle Corporation. All rights reserved.


Username: finuser
Password:

Connected to: Oracle9i Enterprise Edition Release 9.2.0.1.0 - Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.1.0 - Production
Enter array fetch buffer size: 4096 >

Export file: expdat.dmp > san.dmp

(2)U(sers), or (3)T(ables): (2)U > 3

Export table data (yes/no): yes > y

Compress extents (yes/no): yes > n

EXP-00094: Could not convert to server national character set's handle
EXP-00000: Export terminated unsuccessfully

How many ORACLE_HOMEs do you have in that box?
If more than one, are you sure you have set the right one before attempting export?

If you do... echo $LD_LIBRARY_PATH
what do you see?