Problem with to_date/to_char

Hi,
Can somebody tell me why this query don't work when I use to_date
Instead of to_char

By using to_char:

select
 to_char(last_day(cast(current_date - interval '1 month' as date)),'DD.MM.YYYY')
 ;

Result:  31.08.2003

By using to_date:

select
 to_date(last_day(cast(current_date - interval '1 month' as date)),'DD.MM.YYYY')
 ;

Result:  01.23.0037

What can I do that this query works correctly with to_date?

Thanxx

Schoeib

4Tek Gesellschaft für angewandte Informationstechnologien mbH
Schoeib Amin
Tel.  +49 (0) 69 697688-132
Fax. +49 (0) 69 697688-111
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