SQL & PL/SQL :: Query Related To Date

i have a view in a schema of my database 'vw_get_noti_calendar_data' and i want to select some field but it shows an error 'invalid number' and i have observed it but no effect,so where is the error.

my code is---------

SELECT *
FROM aepuser.vw_get_noti_calendar_data
WHERE TO_DATE (TO_CHAR (event_start_date, 'mm/dd/yyyy'), 'dd/mm/yyyy')
BETWEEN TO_DATE (TO_CHAR ('2/28/2012', 'mm/dd/yyyy'), 'dd/mm/yyyy')
AND TO_DATE (TO_CHAR ('2/28/2012', 'mm/dd/yyyy'), 'dd/mm/yyyy')
AND srnum BETWEEN 5 * 1 + 1 AND 5 * 1 + 5;