ListBox can't refresh the data, help! Thanks!

[Franchdream]

I use the AccessDataSourc e to fill the data for Listbox. I doesn't use the
DataSet.
But when I check button to update the database, the Listbox can't fresh the
data at onece.
And the Code which behind is no use:
private void setDataBind()
{
AccessDataSourc e2.Select(DataS ourceSelectArgu ments.Empty);
AccessDataSourc e3.Select(DataS ourceSelectArgu ments.Empty);
ListBox2.DataBi nd();
ListBox1.DataBi nd();
Page.DataBind() ;
}
Who can tell me how I would resolve it ? Thanks!

<asp:ListBox ID="ListBox1" runat="server" DataSourceID="A ccessDataSource 2"
DataTextField=" itemname"
DataValueField= "appnumber" Height="153px"
SelectionMode=" Multiple" CausesValidatio n="True"></asp:ListBox>

<asp:AccessData Source ID="AccessDataS ource2" runat="server"
DataFile="~/App_Data/data.mdb"
SelectCommand=" SELECT distinct appdata.appnumb er,
appdata.itemnam e FROM appdata WHERE ( appdata.appnumb er not in
(SELECT distinct critique.appnum ber FROM critique where expertid=? or
critique.appnum ber in (select critique.appnum ber from critique GROUP BY
critique.appnum ber HAVING (COUNT(critique .appnumber) 2))) AND
(appdata.studya rea = ?))">
<SelectParamete rs>
<asp:ControlPar ameter ControlID="Grid View1" DefaultValue="0 "
Name="expertid" PropertyName="S electedValue" />
<asp:ControlPar ameter ControlID="Tree View1" DefaultValue="0 "
Name="studyarea " PropertyName="S electedValue" />
</SelectParameter s>
</asp:AccessDataS ource>