DataEnvironment

I am using the DataEnvironment with the DataGrid control. The DataGrid is in one form (say form1) and I am doing the selection from another form (say form2). The first time when I do a selection I see the correct data on the datagrid. But if I change the selection criteria, I still see the old data on the DataGrid. I tried refreshing, requiring but its giving me errors all the time. Does any body know how to make the data change when I do a selection?

What kind of errors are you getting?

John G

deReports.rscmdDateReport_Grouping.Requery
frmPreviewDate.DataGrid1.Refresh
Set frmPreviewDate.DataGrid1.DataSource = deReports

deReports.rscmdDateReport_Grouping.Close

With the above code code I get the error on the first line which is

Run-time error '-2147217904
No value given for one or more required parameters.
---------------------------------------
deReports.rscmdDateReport_Grouping.Requery
deReports.cmdDateReport_Grouping cmbDepartment, dtStartDate, dtEndDate

with the above code, I get the following error

3704 - Operation is not allowed when the object is closed.

ps. tell me how to refresh all the databse....

the problem with my project is exactly same , however to see desirable results i need to just re-run the project so the parent-child relationships i have made are reset.
if you have a solution to reset the the dataenvironment during the run-time then the problem will be solved hopefully...

ps. reply soon its really urgent.....