I created a web user control (*.ascx) file it works with a page that has no master pages directive but it doesn't work when the page has MasterPageFile="~/MasterPage.master"  is there a way around this problem.

Thanks

I would have to look at your complete code. Here is an example from an aspx page:

When your aspx page has a master page, you need to make sure any content for that page is put inside of the contentplaceholder on that page. If your page does not have a contentplaceholder this could be the problem. See the example below.

<%@ Page Language="VB" MasterPageFile="~/Intranet.master" AutoEventWireup="false"
    CodeFile="Default.aspx.vb" Inherits="FR_Default" Title="Untitled Page" ValidateRequest="false" %>
<%@ Register src="../UserControls/FormsRepository/FormsTool.ascx" TagName="FormsTool"
    TagPrefix="uc1" %>


<asp:Content ID="Content2" ContentPlaceHolderID="ContentPlaceHolderMain" runat="Server">

    <uc1:FormsTool ID="FormsTool1" runat="server" />

if the call to the usercontrol is not inside of the content place holder it will not work correctly. Hope this helps.

Thanks all for your replies here is what I have in my test page

But still it doesn't work. The user control is just a drop down calendar (textbox, input button, calendar control and a panel) with two properties.
I have no idea what is wrong with my page

here is the code for the *.ascx

This is the code in the code behind *.cs