Hanky,
Would you explian how commit, is useful in export ,

i didnt find this parameter for exp in my DB, just kidding , may be you are confused...


DscoBOB,

As Hanky suggested you have to set the NLS_LANG ( this is OS environmental variable )

Now you query the database as
select * from v$nls_parameters;

and check for character set.. with that, now you have to do

set NLS_LANG=american_america.

To my understanding the RECORDLENGTH parameter will be used in conjunction with DIRECT=Y, as this specifies the size of the I/O buffer.. ( multiples of OS file system block size )
This improves the perfomrnace by working

Hope this time you will succeed.. And why dont you consider
Jurij Modic ideas ??/