Dynamicly added usercontrol not working

Good afternoon,
I have a small problem with a usercontrol. The UserControl that I made is a simple linkbutton with an onclick event.
The problem is that de onclick event is not working, it doesn't even get to the brakepoint I made in the event.
I want to use the usercontrol to put linkbuttons inside a calendar for eacht appointment, so when an user wants to see the details he just has to click on the button for more details.
There no errors while running the code.
Thanks in advance!
Here is my code:
Web page code behind:
Imports System.Data.SqlClient Imports System.Data Imports System.Web.UI Imports System.Web.UI.WebControls Imports System.Reflection Partial Class Index Inherits System.Web.UI.Page Public lesDatums As DataTable Public afspraakDatums As DataTable Public datum&nbs ...