Date Formatting Question

 Hi Folks

I am trying to figure out what I am missing here when trying to use to_char and to_date in my code

i have broken it down to just using sysdate and dual so if someone can help me on this i would appreciate it

if i do

select sysdate from dual where to_char(sysdate,'yyyy/mm/dd') = '2009/09/25';

i get

SYSDATE
---------
25-SEP-09

if i do

select sysdate from dual where sysdate = to_date ('2009/09/25','yyyy/mm/dd');

i get

no rows selected

so i cannot figure out why the second sql returns nothing