Checking status of checkbox in datalist

Hi

I'm trying to check status for checked/unchecked in a checkbox wrapped by a datalist control. The aspx code is imple and looks like this:
<asp:DataList
        ID="RolesDataList"
        DataSource="<%# MembershipHelper.GetRoles() %>"
        DataKeyField="RoleName"
        BorderStyle="None"
        RepeatColumns="1"
        RepeatDirection="Horizontal"
        RepeatLayout="Table"
        runat="server"
      >
        <ItemTemplate>
            <asp:CheckBox ID="RoleCheckBox" Text='<%# Eval("RoleName") %>' runat="server" />
        </ItemTemplate>
      </asp:DataList>
---------------------------------------------------
The code behin looks like this:

For Each control As Control In RolesDataList.Controls
                Dim roleCheckBox As CheckBox = control.FindControl("RoleCheckBox")

                If Not roleCheckBox Is Nothing AndAlso roleCheckBox.Checked Then
                    ' Do something
                End If
            Next
-----------------------------------------------------------
The strange thing is that independent if the checbox is checked or not the value is returned as checked=false (I have debugged the page to see). It finds the checkbox items ok and everything but I can not understand why it want show it as checked when it is.

If anyone hase any suggestions I would be grateful.

Peter