OpenAuthProviders not working if placed Masterpage

Hi All,
I am trying to add the OpenAuthProviders reference in my masterpage inside an overlay (even if this is not a clue because the OpenAuthProviders don't work either inside an overlay or not).
Basically, when I click on the account link placed on masterpage, an overlay is fired that allows users to login or register without going to a login/register page.
My markup is the following one:
In my Masterpage I have added the following references:
<%@ Register Src="~/OpenAuthProviders.ascx" TagPrefix="uc" TagName="OpenAuthProviders" %> <%@ Register Src="~/OpenAuthProvidersRegister.ascx" TagPrefix="ucc" TagName="OpenAuthProvidersRegister" %> And inside the overlays:
This is to signin:
<uc:OpenAuthProviders runat="server" ID="OpenAuthLogin" /> This ...