The below link will describe how to re-create the ICA listener in Presentation Server.  We were having a problem where our Citrix server was refusing connections and displaying an SSL error 29, protocol driver error.  When we would go into the Citrix Management Console we noted that the session 65536 was down, when it should be listening. 

We followed the steps below to re-create our ICA listener and that seemed to resolve the issue.

How to Re-create the ICA Listener in Presentation Server 4.x