asp:ControlParameter access control in different asp:Content block (Master Pages)

I am setting up an application with two content blocks: FiltersContent and MainContent.

I want to use a Reports.master to style the filters and results into their own blocks. The problem is that when I try to use a in the of a , something like:

<asp:SqlDataSource [...] >          
      <SelectParameters>
        <asp:ControlParameter ControlID="statusFilter" DefaultValue="-1" PropertyName="SelectedValue" />
        <asp:ControlParameter ControlID="startDateFilter" DefaultValue="01/01/1990" PropertyName="Text" />
        <asp:ControlParameter ControlID="endDateFilter" DefaultValue="01/01/2070" PropertyName="Text" />
      </SelectParameters>
  </as开发者_开发问答p:SqlDataSource>

It is cannot find the control producing a error like

Could not find control 'statusFilter' in ControlParameter ''.

As soon as I move the filter controls into the 'Main'

  <asp:Content ContentPlaceHolderId="MainContent" ... >

they work properly.

So my question is: Is it possible to access the controls from a SqlDataSource in a different Content block?

I think the syntax is:

<asp:ControlParameter ControlID="parentControl$Childcontrol" DefaultValue="-1" PropertyName="SelectedValue" />