Accessing Radgrid items on parent page from a usercontrol

Question

I have several pages that share a user control. When the user clicks a save button on the user control, I need to be able to loop the items of a Radgrid on the parent page and get the selected items. The radgrid has a checkbox column. I can see that I am getting values from the grid cells but for some reason the checked value on the checkbox is always false even when it is checked. This same foreach code works when called from the parent page itself but not from the usercontrol.

Here is a code snippet.

RadGrid ProjectGrid = (RadGrid) this.Parent.FindControl("ProjectGrid");

        foreach (GridDataItem item in ProjectGrid.MasterTableView.Items)
        {
            string applicationPackageId = item.Cells[4].Text.ToString();

            CheckBox chbx = item.FindControl("ProjectGridCheckBox") as CheckBox;

            if (chbx != null && chbx.Checked)
            {
                numCheckedPackages++;
            }
        }

Here is my grid.

<telerik:RadGrid ID="ProjectGrid" runat="server" Skin="WF" ShowHeader="true" EnableEmbeddedSkins="false" AllowSorting="false" AllowFilteringByColumn="false" AllowMultiRowSelection="true">
    <MasterTableView Width="100%" CommandItemDisplay="None" AutoGenerateColumns="false" TableLayout="Fixed">
        <RowIndicatorColumn Visible="False">
            <HeaderStyle Width="20px" />
        </RowIndicatorColumn>
        <ExpandCollapseColumn Resizable="False" Visible="False">
            <HeaderStyle Width="20px" />
        </ExpandCollapseColumn>
        <Columns>
            <telerik:GridTemplateColumn UniqueName="SelectColumn" DataField="Id" HeaderStyle-Width="5%" >  
                <ItemTemplate>  
                    <asp:CheckBox ID="ProjectGridCheckBox"   runat="server"/>  
                </ItemTemplate>
            </telerik:GridTemplateColumn>
            <telerik:GridBoundColumn DataField="Package.ProjectPackageNumberNameDisplayField" HeaderText="Project - Package" UniqueName="ProjectPackages"  HeaderStyle-Width="85%"></telerik:GridBoundColumn>
            <telerik:GridBoundColumn DataField="ApplicationPackageID" HeaderText="Id" HeaderStyle-Width="15%" UniqueName="PackageId"></telerik:GridBoundColumn>                                    
        </Columns>
    </MasterTableView>
    <ClientSettings EnableRowHoverStyle="true">
        <Selecting AllowRowSelect="True" />
    </ClientSettings>
    <HeaderStyle BackColor="#666666" Font-Names="verdana, arial" Font-Size="Small" Height="20px" />
</telerik:RadGrid>