Date format

I got a problem with oracle 7.2 and NLS_DATE_FORMAT. In the table my dates is like : 01-JAN-99 but if i use this SQL command :

select to_char(dates,'DD-MM-YYYY') from test;

result is : 01-JAN-2099 but I want : 01-JAN-1999 and I can't give the year with 4 digits with AutoLisp/AutoCAD.

If I put this environment variable in Windows NT4 :

    NLS_DATE_FORMAT = DD-MON-RR
it will working very well,

but i'd like to set this variable in INITCLT.ORA and if I try this :

    NLS_DATE_FORMAT = 'DD-MON-RR'
Nothing append.

Perhaps the syntax is not good.

Thanks for any help,

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