Refreshing a datalist according to add, update n delete

I hava a datalist which I ve bounded to a command from a dataenvironment. The problem is that the list does not get refreshed with the modifications i make to the database.
I ve used
set datalist1.datasource= dataenvironment1,
dataenvironment1.rs.Requery
datalist1.refill
datalist1.Refresh

after every modification.
But still the refreshing is not happening.
Can anyone help out.
Thanx in advance
Priya
(padma@informindia.com)