Single Sign On Logout

Hi,

We are using sitefinity as Identity Provider for an external application. The user is redirected to Sitefinity for authentication and  once he is logged in he gets redirected to the realm of the relying party.

We would like to implement the logout functionality in the same fashion. However if we redirect the user to Sitefinity/SignOut?sts_signout=true the user is redirected to Sitefinity home page. Is there any way of redirecting the user back to our relying party?