Query mysql does not return results

I am executing this query

SELECT *
FROM temp
WHERE DATE_FORMAT(startTime,'%m/%d/%Y') = '7/15/2012'

and startTime column has this value '2012-07-15 12:00:00'

But this is not returning any results. Can somebody please help?

---

Change here:

7/15/2012

to:

07/15/2012