Calling post back event from JavaScript

Based on this post, I am trying to fire button click event from Java Script to ASP.net.
http://stackoverflow.com/questions/7646162/how-to-fire-a-button-click-event-from-javascript-in-asp-net


Here is what I have right now:

// In Server Side code
Protected Sub Page_Load(ByVal sender As Object, ByVal e As EventArgs) Handles MyBase.Load
         Page.GetPostBackEventReference(DirectCast(wizCandidate.FindControl("FinishNavigationTemplateContainerID$btnFinish"), Button))

End Sub

        Protected Sub wizCandidate_FinishButtonClick(ByVal sender As Object, ByVal e As System.Web.UI.WebControls.WizardNavigationEventArgs) Handles wizCandidate.FinishButtonClick
...... bunch of code here
End Sub

// Javascript
function SetSaved() {
                    __doPostBack("<%= btnFinish.UniqueID %>", "OnClick");
}

// ASP
 <div hidden><asp:Button ID="btnFinish" runat="server" OnClick="wizCandidate_FinishButtonClick"/></div>
--------
Right now when java script execute __doPostBack function, it does post back and if I have a debugging point at form_load() function, I can get to it.  However, it is not raising the event to call wizCandidate_FinishButtonClick function.

Do you know what I am doing wrong?